MESON Chess Problem Database
Problem Display
PID: 210346 (1K6/4Qp2/4p3/2pkPP2/3bN2R/Bp2pB2/1P1nP3/3R4 w - - 0 1)
Stubbs, Arthur Goodwin
The Observer, 1920
(First published on Sun Oct 10 1920)
#2
11 + 8
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Bc3
- 2.Qxc5#
- 1...Bxe5+
- 2.Sd6#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...exf5
- 2.Sxd2#
- 1...f6
- 2.Qxe6#
- 1...Kc4
- Tries
- 1.Kb7?
- 1...Kc4
- 2.Sd6#
- 1...Bxb2
- 2.Qxc5#
- 1...Bxe5
- 2.Sxd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Kc4
- 1.Kc7?
- 1...Bxe5+
- 2.Sd6#
- 1...Kc4
- 2.Sd6#
- 1...Bxb2
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Bxe5+
- 1.Ka8?
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Bxe5
- 2.Sxd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Kc4
- 1.Kc8?
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Bxe5
- 2.Sxd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Kc4
- 1.Sf2+?
- 1...Kc4
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Se4
- 2.Qxc5#
- 1...Kxe5!
- 1...Kc4
- 1.Sc3+?
- 1...Kc4
- 2.Qxc5#
- 1...Kxe5!
- 1...Kc4
- 1.Sg3+?
- 1...Kc4
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Se4
- 2.Qxc5#
- 1...Kxe5!
- 1...Kc4
- 1.Sg5+?
- 1...Kc4
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Se4
- 2.Qxc5#
- 1...Kxe5!
- 1...Kc4
- 1.Sf6+?
- 1...Kc4
- 2.Qxc5#
- 1...Kxe5!
- 1...Kc4
- 1.Bh1?
- 1...Bxe5+
- 2.Sd6#
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sf3
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Bxe5+
- 1.Bg2?
- 1...Bxe5+
- 2.Sd6#
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sf3
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Bxe5+
- 1.Rg4?
- 1...Bxe5+
- 2.Sd6#
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Kxe5!
- 1...Bxe5+
- 1.Qb7+?
- 1...Kc4
- 2.Sd6#
- 1...Kxe5!
- 1...Kc4
- 1.Qc7?
- threat
- 2.Sxd2#
- 1...Kc4
- 2.Sd6#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...Sb1
- 2.Sd2#
- 2.Qxc5#
- 1...Sf1
- 2.Sd2#
- 2.Qxc5#
- 1...Sc4
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sf6#
- 2.Qxc5#
- 1...exf5!
- threat
- 1.Qd7+?
- 1...Kc4
- 2.Sd6#
- 1...Kxe5!
- 1...Kc4
- 1.f6?
- 1...Bxe5+
- 2.Sd6#
- 1...Kc4
- 2.Sd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...Kxe5!
- 1...Bxe5+
- 1.Kb7?
- Keys
- 1.Rf4!
- 1...Bxe5+
- 2.Sd6#
- 1...Kc4
- 2.Sd6#
- 1...Kxe5
- 2.Qd6#
- 1...Kc6
- 2.Qb7#
- 1...Bxb2
- 2.Qxc5#
- 1...Sxf3
- 2.Qxc5#
- 1...Sxe4
- 2.Qxc5#
- 1...exf5
- 2.Sxd2#
- 1...Bc3
- 2.Qxc5#
- 1...Sb1
- 2.Qxc5#
- 1...Sf1
- 2.Qxc5#
- 1...Sc4
- 2.Qxc5#
- 1...c4
- 2.Qd6#
- 1...f6
- 2.Qxe6#
- 1...Bxe5+
- 1.Rf4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(g);XP(I)::B(E)+S(F),XS(a)
- P(h);N_GUARD::QAB1(J),XP(g)
- Tries
- Try
- K(K);P-FLIGHT
- Vars
- K(f);S_FLIGHT::S(F)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- K(K);S_FLIGHT
- Vars
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- K(f);S_FLIGHT::S(F)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- K(K);P-FLIGHT
- Vars
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- K(K);P-FLIGHT
- Vars
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- S(F);CHECK
- Vars
- K(f);P_SPINB(d),S_FLIGHT::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a)::QAR1(J),XP(e)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- S(F);CHECK
- Vars
- K(f);P_SPINB(d),S_FLIGHT::QAR1(J),XP(e)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- S(F);CHECK
- Vars
- K(f);P_SPINB(d),S_FLIGHT::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a)::QAR1(J),XP(e)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- S(F);CHECK
- Vars
- K(f);P_SPINB(d),S_FLIGHT::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a)::QAR1(J),XP(e)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- S(F);CHECK
- Vars
- K(f);P_SPINB(d),S_FLIGHT::QAR1(J),XP(e)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- B(E);
- Vars
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- B(E);
- Vars
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- R(G);
- Vars
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- Q(J);CHECK
- Vars
- K(f);S_FLIGHT::S(F)
- Refutation
- K(f);P-FLIGHT,XP(H)
- Try
- Q(J);
- Threat
- B(E)+S(F),XS(a)
- Vars
- K(f);P_SPINP(e),S_FLIGHT::S(F)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- Refutation
- P(g);XP(I)
- Try
- Q(J);CHECK
- Vars
- K(f);S_FLIGHT::S(F)
- Refutation
- K(f);P-FLIGHT,XP(H)
- Try
- P(I);
- Vars
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- K(f);S_FLIGHT::S(F)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- Refutation
- K(f);P-FLIGHT,P_SPINP(g),XP(H)
- Try
- Actual
- R(G);
- Vars
- B(d);CHECK,P_SPINS(a),SBLOCK,XP(H)::B(E)+S(F)
- K(f);S_FLIGHT::S(F)
- K(f);P-FLIGHT,P_SPINP(g),XP(H)::QAB1(J)
- K(f);S_FLIGHT::QAB1(J)
- B(d);N_GUARD,P_SPINS(a),XP(B)::QAR1(J),XP(e)
- S(a);P_SPINB(d),XB(E)::QAR1(J),XP(e)
- S(a);P_SPINB(d),P_SPINS(a),XS(F)::QAR1(J),XP(e)
- P(g);XP(I)::B(E)+S(F),XS(a)
- B(d);N_GUARD,P_SPINS(a)::QAR1(J),XP(e)
- S(a);P_SPINB(d)::QAR1(J),XP(e)
- P(e);SBLOCK::QAR1(J)
- P(h);N_GUARD::QAB1(J),XP(g)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).