MESON Chess Problem Database
Problem Display
PID: 267682 (1n2R3/8/5p2/8/1PpkBr2/2pp2NQ/2n2P1K/6B1 w - - 0 1)
Thain, JO
The Referee, 1928
(First published on Sun Feb 26 1928)
#2
8 + 8
| 15239 | Valois Notebooks | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rg4
- 2.Sf5#
- 1...Rh4
- 2.Sf5#
- 1...Rf5
- 2.Sxf5#
- 1...Sa1
- 2.f3#
- 1...Se1
- 2.f3#
- 1...Sa3
- 2.f3#
- 1...Se3
- 2.fxe3#
- 1...Sxb4
- 2.f3#
- 1...Sa6
- 2.Qd7#
- 1...Sc6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...d2
- 2.Se2#
- 1...f5
- 2.Qh8#
- 1...Rg4
- Tries
- 1.Bc6?
- 1...Sxb4
- 2.f3#
- 1...Sxc6
- 2.Qd7#
- 1...d2
- 2.Se2#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Sf5#
- 2.Rxe4#
- 1...Rg4
- 2.Sf5#
- 2.Qxg4#
- 1...Rh4
- 2.Sf5#
- 2.Qxh4#
- 1...Rf5
- 2.Sxf5#
- 2.Re4#
- 1...Sa1
- 2.f3#
- 1...Se1
- 2.f3#
- 1...Sa3
- 2.f3#
- 1...Se3
- 2.fxe3#
- 1...Sa6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...f5
- 2.Qh8#
- 1...Rxf2+!
- 1...Sxb4
- 1.Bb7?
- 1...Sxb4
- 2.f3#
- 1...Sc6
- 2.Qd7#
- 1...d2
- 2.Se2#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Sf5#
- 2.Rxe4#
- 1...Rg4
- 2.Sf5#
- 2.Qxg4#
- 1...Rh4
- 2.Sf5#
- 2.Qxh4#
- 1...Rf5
- 2.Sxf5#
- 2.Re4#
- 1...Sa1
- 2.f3#
- 1...Se1
- 2.f3#
- 1...Sa3
- 2.f3#
- 1...Se3
- 2.fxe3#
- 1...Sa6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...f5
- 2.Qh8#
- 1...Rxf2+!
- 1...Sxb4
- 1.Ba8?
- 1...Sxb4
- 2.f3#
- 1...Sc6
- 2.Qd7#
- 1...d2
- 2.Se2#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Sf5#
- 2.Rxe4#
- 1...Rg4
- 2.Sf5#
- 2.Qxg4#
- 1...Rh4
- 2.Sf5#
- 2.Qxh4#
- 1...Rf5
- 2.Sxf5#
- 2.Re4#
- 1...Sa1
- 2.f3#
- 1...Se1
- 2.f3#
- 1...Sa3
- 2.f3#
- 1...Se3
- 2.fxe3#
- 1...Sa6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...f5
- 2.Qh8#
- 1...Rxf2+!
- 1...Sxb4
- 1.Rd8+?
- 1...Ke5
- 2.Rd5#
- 1...Sd7!
- 1...Ke5
- 1.Bc6?
- Keys
- 1.Qg4!
- 1...Rxf2+
- 2.Bg2#
- 1...Rxe4
- 2.Qxe4#
- 1...Rxg4
- 2.Sf5#
- 1...Sxb4
- 2.f3#
- 1...Rf3
- 2.Bxf3#
- 1...Rf5
- 2.Sxf5#
- 1...Sa1
- 2.f3#
- 1...Se1
- 2.f3#
- 1...Sa3
- 2.f3#
- 1...Se3
- 2.fxe3#
- 1...Sa6
- 2.Qd7#
- 1...Sc6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...d2
- 2.Se2#
- 1...f5
- 2.Qg7#
- 1...Rxf2+
- 1.Qg4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(f);N_GUARD::S(D)
- R(f);N_GUARD,P_PINQ(E)::S(D)
- R(f);N_GUARD::S(D),XR(f)
- S(a);N_GUARD::B(A)+P(B)
- S(a);OGATE::P(B),XS(a)
- S(a);N_GUARD,XP(F)::B(A)+P(B)
- S(h);N_GUARD::QAR(E)
- S(h);N_GUARD::QAR(E),XS(h)
- P(c);N_GUARD::S(D)
- P(g);OGATEB::QAB(E)
- Tries
- Try
- B(G);
- Vars
- S(a);N_GUARD,XP(F)::B(A)+P(B)
- S(h);N_GUARD,XB(G)::QAR(E)
- P(c);N_GUARD::S(D)
- R(f);N_GUARD::R1(H)
- S(a);N_GUARD::B(A)+P(B)
- S(a);OGATE::P(B),XS(a)
- S(h);N_GUARD::QAR(E)
- S(h);N_GUARD::QAR(E),XS(h)
- P(g);OGATEB::QAB(E)
- Refutation
- R(f);CHECK,P_SPINR(f),XP(B)
- Try
- B(G);
- Vars
- S(a);N_GUARD,XP(F)::B(A)+P(B)
- S(h);N_GUARD::QAR(E)
- P(c);N_GUARD::S(D)
- R(f);N_GUARD::R1(H)
- S(a);N_GUARD::B(A)+P(B)
- S(a);OGATE::P(B),XS(a)
- S(h);N_GUARD::QAR(E),XS(h)
- P(g);OGATEB::QAB(E)
- Refutation
- R(f);CHECK,P_SPINR(f),XP(B)
- Try
- B(G);
- Vars
- S(a);N_GUARD,XP(F)::B(A)+P(B)
- S(h);N_GUARD::QAR(E)
- P(c);N_GUARD::S(D)
- R(f);N_GUARD::R1(H)
- S(a);N_GUARD::B(A)+P(B)
- S(a);OGATE::P(B),XS(a)
- S(h);N_GUARD::QAR(E),XS(h)
- P(g);OGATEB::QAB(E)
- Refutation
- R(f);CHECK,P_SPINR(f),XP(B)
- Try
- R(H);CHECK
- Vars
- K(e);S_FLIGHT::R1(H)
- Refutation
- S(h);P_SPINS(h)
- Try
- Actual
- Q(E);
- Vars
- R(f);CHECK,OGATEB,P_SPINR(f),XP(B)::QAR(E)+B(G)
- R(f);OGATE,P_SPINR(f),XB(G)::QAR1(E),XR(f)
- R(f);N_GUARD,XQ(E)::S(D)
- S(a);N_GUARD,XP(F)::B(A)+P(B)
- R(f);OGATEB::QAR(E)+B(G),XR(f)
- R(f);N_GUARD::S(D),XR(f)
- S(a);N_GUARD::B(A)+P(B)
- S(a);OGATE::P(B),XS(a)
- S(h);N_GUARD::QAR(E)
- S(h);N_GUARD::QAR(E),XS(h)
- P(c);N_GUARD::S(D)
- P(g);OGATEB::QAB(E)
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