MESON Chess Problem Database
Problem Display
PID: 114834 (1b5q/3QnP1b/1N2p3/1N2k3/r1p2R1B/5nP1/8/1B5K w - - 0 1)
Andrade, Barry Jack da Costa
Ilford Recorder, 1954
#2
9 + 9
| 81 | Chess | 1955 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qf6
- 2.Bxf6#
- 1...Qc8
- 2.Bf6#
- 1...Qd8
- 2.Bf6#
- 1...Qe8
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Ra1
- 2.Sxc4#
- 1...Ra2
- 2.Sxc4#
- 1...Ra3
- 2.Sxc4#
- 1...Ra5
- 2.Sxc4#
- 1...Ra6
- 2.Sxc4#
- 1...Ra7
- 2.Sxc4#
- 1...Ra8
- 2.Sxc4#
- 1...Bd6
- 2.Qxd6#
- 1...Ba7
- 2.Qd6#
- 2.Qc7#
- 1...Bc7
- 2.Qxc7#
- 1...Se1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sh2
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sxh4
- 2.Qd4#
- 1...Sg5
- 2.Qd4#
- 1...Sf5
- 2.Re4#
- 1...Qf6
- Tries
- 1.Sd4?
- threat
- 2.Sxf3#
- 2.Qxe6#
- 1...Sxd4
- 2.Qxd4#
- 1...Sxh4
- 2.Qxe6#
- 1...Qf6
- 2.Sxf3#
- 2.Bxf6#
- 1...Qc8
- 2.Sxf3#
- 2.Bf6#
- 1...Ra3
- 2.Sxc4#
- 2.Qxe6#
- 1...Be4
- 2.Rxe4#
- 1...Bf5
- 2.Sxf3#
- 1...Se1
- 2.Qxe6#
- 1...Sg1
- 2.Qxe6#
- 1...Sd2
- 2.Qxe6#
- 1...Sh2
- 2.Qxe6#
- 1...Sg5!
- threat
- 1.Re4+?
- 1...Kf5
- 2.Qxe6#
- 1...Bxe4!
- 1...Kf5
- 1.Qc6?
- threat
- 2.Sd7#
- 1...Qc8
- 2.Bf6#
- 1...Qd8
- 2.Bf6#
- 1...Qe8
- 2.Bf6#
- 1...Ra7
- 2.Sxc4#
- 1...Sxc6!
- threat
- 1.Qc8?
- threat
- 2.Qxh8#
- 1...Qxc8
- 2.Bf6#
- 1...Qg7
- 2.Qxb8#
- 1...Qf6
- 2.Bxf6#
- 2.Qxb8#
- 1...Qd8
- 2.Bf6#
- 1...Qe8
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Bg8
- 2.Qxb8#
- 1...Sd5
- 2.Sd7#
- 1...Sf5
- 2.Re4#
- 2.Qc5#
- 1...Sg6
- 2.Qc5#
- 1...Sg8
- 2.Qc5#
- 2.Qxb8#
- 1...Sxc8!
- threat
- 1.Qd5+?
- 1...Sxd5
- 2.Sd7#
- 1...exd5!
- 1...Sxd5
- 1.Qb7?
- threat
- 2.Sd7#
- 1...Qc8
- 2.Bf6#
- 1...Qd8
- 2.Bf6#
- 1...Qe8
- 2.Bf6#
- 1...Sc6!
- threat
- 1.Qxe7?
- threat
- 2.Qc5#
- 1...Qc8
- 2.Bf6#
- 2.Qf6#
- 1...Qd8
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 2.Qf6#
- 1...Bd6
- 2.Qxd6#
- 1...Be4!
- threat
- 1.Qd8?
- threat
- 2.Qxh8#
- 1...Qxd8
- 2.Bf6#
- 1...Qg7
- 2.Qxb8#
- 1...Qf6
- 2.Bxf6#
- 2.Qxb8#
- 1...Qe8
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Bg8
- 2.Qxb8#
- 1...Sd5
- 2.Sd7#
- 1...Sf5
- 2.Re4#
- 1...Sg8
- 2.Qxb8#
- 1...Sg6!
- threat
- 1.Sd4?
- Keys
- 1.Qe8!
- threat
- 2.Qxh8#
- 1...Qxe8
- 2.Bf6#
- 1...Qg7
- 2.Qxb8#
- 1...Qf6
- 2.Bxf6#
- 2.Qxb8#
- 1...Qf8
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Bg8
- 2.Qxb8#
- 1...Sd5
- 2.Sd7#
- 1...Sf5
- 2.Re4#
- 1...Sg6
- 2.Rf5#
- 1...Sg8
- 2.Qxb8#
- threat
- 1.Qe8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 19
- Sets
- Q(i);N_GUARD::B(E),XQ(i)
- Q(i);N_GUARD::B(E)
- R(b);N_GUARD,P_PINB(A)::S(G),XP(c)
- R(b);N_GUARD::S(G),XP(c)
- B(h);N_GUARD::QAB1(H),XB(h)
- B(h);N_GUARD::QAB(H),XB(h)
- S(a);N_GUARD::QAB1(H)
- S(a);N_GUARD::QAB1(H),XS(a)
- S(a);N_GUARD,XB(E)::QAB1(H)
- S(f);SBLOCK,S_CUTB(g)::R1(D)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- S(a);OGATE,XS(F)::QAB1(H),XS(a)
- S(a);XB(E)::QAR1(H),XP(e)
- B(g);N_GUARD,P_PINB(E)::R1(D),XB(g)
- B(g);P_PINB(E)::S(F),XS(a)
- S(a);::QAR1(H),XP(e)
- Refutation
- S(a);
- Try
- R(D);CHECK
- Vars
- K(d);P-FLIGHT,P_SPINP(e)::QAB1(H),XP(e)
- Refutation
- B(g);P_PINB(E),XR(D)
- Try
- Q(H);
- Threat
- S(G)
- Vars
- Q(i);N_GUARD::B(E)
- R(b);N_GUARD::S(G),XP(c)
- Refutation
- S(f);XQ(H)
- Try
- Q(H);
- Threat
- QAB(H),XQ(i)
- Vars
- Q(i);N_GUARD,XQ(H)::B(E)
- Q(i);N_GUARD::QAB(H),XB(h)
- Q(i);N_GUARD::B(E)
- B(g);P_PINB(E),S_CUTQ(i)::QAB(H),XB(h)
- S(f);SBLOCK::S(G)
- S(f);N_GUARD::QAR2(H)
- Refutation
- S(f);XQ(H)
- Try
- Q(H);CHECK
- Vars
- S(f);SBLOCK,XQ(H)::S(G)
- Refutation
- P(e);XQ(H)
- Try
- Q(H);
- Threat
- S(G)
- Vars
- Q(i);N_GUARD::B(E)
- Refutation
- S(f);
- Try
- Q(H);P_PINP(e),XS(f)
- Threat
- QAR2(H)
- Vars
- Q(i);N_GUARD::B(E)
- B(h);N_GUARD::QAB1(H),XB(h)
- Refutation
- B(g);P_PINB(E)
- Try
- Q(H);
- Threat
- QAB(H),XQ(i)
- Vars
- Q(i);N_GUARD,XQ(H)::B(E)
- Q(i);N_GUARD::QAB(H),XB(h)
- Q(i);N_GUARD::B(E)
- B(g);P_PINB(E),S_CUTQ(i)::QAB(H),XB(h)
- S(f);SBLOCK::S(G)
- S(f);SBLOCK,S_CUTB(g)::R1(D)
- S(f);S_CUTQ(i)::QAB(H),XB(h)
- Refutation
- S(f);
- Try
- Actual
- Q(H);
- Threat
- QAB(H),XQ(i)
- Vars
- Q(i);N_GUARD,XQ(H)::B(E)
- Q(i);N_GUARD::QAB(H),XB(h)
- Q(i);N_GUARD::B(E)
- B(g);P_PINB(E),S_CUTQ(i)::QAB(H),XB(h)
- S(f);P_SPINP(e),SBLOCK::S(G)
- S(f);P_SPINP(e),SBLOCK,S_CUTB(g)::R1(D)
- S(f);N_GUARD,P_SPINP(e),S_CUTB(g)::R1(D)
- S(f);P_SPINP(e),S_CUTQ(i)::QAB(H),XB(h)
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).