MESON Chess Problem Database
Problem Display
PID: 148471 (8/1pN5/5Q2/pR6/B1krn2R/Kp2P3/1p1rP3/1N1b4 w - - 0 1)
Boy, Claude
Europe Echecs, 1977
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rc2
- 2.Bxb3#
- 2.Qxd4#
- 1...Rxe2
- 2.Qxd4#
- 1...Rd5
- 2.Qc3#
- 1...Rd6
- 2.Qc3#
- 1...Rd7
- 2.Qc3#
- 1...Rd8
- 2.Qc3#
- 1...Sf2
- 2.Qe6#
- 2.Qf7#
- 1...Sc3
- 2.Sxd2#
- 1...Sg3
- 2.Qe6#
- 2.Qf7#
- 1...Sd6
- 2.Qe6#
- 1...Rc2
- Tries
- 1.Sd5?
- threat
- 2.Sb6#
- 1...Rxe2
- 2.Qxd4#
- 1...Rxd5
- 2.Qc3#
- 1...b6
- 2.Sxb6#
- 1...Bxe2!
- threat
- 1.Sa8?
- threat
- 2.Sb6#
- 1...Rxe2
- 2.Qxd4#
- 1...Rd6
- 2.Qc3#
- 1...b6
- 2.Sxb6#
- 1...Bxe2!
- threat
- 1.Rxe4?
- threat
- 2.Qe6#
- 2.Qf7#
- 1...Rxe2
- 2.Rxd4#
- 2.Qxd4#
- 1...Rxe4
- 2.Sxd2#
- 2.Qc3#
- 1...Bxe2!
- threat
- 1.Rb4+?
- 1...Kc5
- 2.Qb6#
- 1...axb4+!
- 1...Kc5
- 1.Rc5+?
- 1...Sxc5
- 2.Bb5#
- 1...Kxc5!
- 1...Sxc5
- 1.Rd5?
- threat
- 2.Bb5#
- 1...Rxd5
- 2.Qc3#
- 1...Sc3
- 2.Sxd2#
- 1...b5
- 2.Bxb5#
- 1...Sd6!
- threat
- 1.Re5?
- threat
- 2.Bb5#
- 1...Sc3
- 2.Sxd2#
- 1...Sd6
- 2.Qe6#
- 1...b5
- 2.Bxb5#
- 1...Rd5!
- threat
- 1.Rg5?
- threat
- 2.Bb5#
- 1...Rd5
- 2.Qc3#
- 1...Sc3
- 2.Sxd2#
- 1...Sd6
- 2.Qe6#
- 1...b5
- 2.Bxb5#
- 1...Sxg5!
- threat
- 1.Rbh5?
- threat
- 2.Bb5#
- 1...Rd5
- 2.Qc3#
- 1...Sc3
- 2.Sxd2#
- 1...Sd6
- 2.Qe6#
- 1...b5
- 2.Bxb5#
- 1...Sg5!
- threat
- 1.Qc6+?
- 1...Sc5
- 2.Rxc5#
- 2.Qd5#
- 2.Qxc5#
- 1...bxc6!
- 1...Sc5
- 1.Sd5?
- Keys
- 1.Rf5!
- threat
- 2.Bb5#
- 1...Rd5
- 2.Qc3#
- 1...Sc3
- 2.Sxd2#
- 1...Sd6
- 2.Qe6#
- 1...b5
- 2.Bxb5#
- threat
- 1.Rf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(c);N_GUARD,XP(B)::QAR1(H),XR(f)
- R(f);OGATE,P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(f),SBLOCK::S(A),XR(c)
- S(g);P_SPINR(f)::QAB(H)
- Tries
- Try
- S(I);
- Threat
- S(I)
- Vars
- R(c);N_GUARD,XP(B)::QAR1(H),XR(f)
- R(f);OGATE,P_SPINS(g),XS(I)::QAR1(H)
- P(i);::S(I),XP(i)
- Refutation
- B(a);XP(B)
- Try
- S(I);
- Threat
- S(I)
- Vars
- R(c);N_GUARD,XP(B)::QAR1(H),XR(f)
- R(f);OGATE,P_SPINS(g)::QAR1(H)
- P(i);::S(I),XP(i)
- Refutation
- B(a);XP(B)
- Try
- R(F);P_PINR(f),XS(g)
- Threat
- DUALS(2)
- Refutation
- B(a);XP(B)
- Try
- R(G);CHECK
- Vars
- K(e);P-FLIGHT::QAB1(H)
- Refutation
- P(h);CHECK,XR(G)
- Try
- R(G);CHECK
- Vars
- S(g);P_SPINR(f),SBLOCK,XR(G)::B(E)
- Refutation
- K(e);P-FLIGHT,XR(G)
- Try
- R(G);
- Threat
- B(E)
- Vars
- R(f);OGATE,P_SPINS(g),XR(G)::QAR1(H)
- S(g);N_GUARD,P_SPINR(f),SBLOCK::S(A),XR(c)
- P(i);::B(E),XP(i)
- Refutation
- S(g);P_SPINR(f)
- Try
- R(G);
- Threat
- B(E)
- Vars
- S(g);N_GUARD,P_SPINR(f),SBLOCK::S(A),XR(c)
- S(g);P_SPINR(f)::QAB(H)
- P(i);::B(E),XP(i)
- Refutation
- R(f);P_SPINS(g)
- Try
- R(G);
- Threat
- B(E)
- Vars
- R(f);OGATE,P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(f),SBLOCK::S(A),XR(c)
- S(g);P_SPINR(f)::QAB(H)
- P(i);::B(E),XP(i)
- Refutation
- S(g);P_SPINR(f),XR(G)
- Try
- R(G);
- Threat
- B(E)
- Vars
- R(f);OGATE,P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(f),SBLOCK::S(A),XR(c)
- S(g);P_SPINR(f)::QAB(H)
- P(i);::B(E),XP(i)
- Refutation
- S(g);P_SPINR(f)
- Try
- Q(H);CHECK
- Refutation
- P(i);XQ(H)
- Try
- Actual
- R(G);
- Threat
- B(E)
- Vars
- R(f);OGATE,P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(f),SBLOCK::S(A),XR(c)
- S(g);P_SPINR(f)::QAB(H)
- P(i);::B(E),XP(i)
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).