MESON Chess Problem Database
Problem Display
PID: 137052 (3b2K1/5R1N/6P1/4B2p/Rq5k/r2b3P/5NBp/1r1Q4 w - - 0 1)
Unwin, George
3rd Extraordinary Prize, Chess Correspondent, 1946
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Qxd8#
- 1...Bc2
- 2.Qxd8#
- 1...Be2
- 2.Qxd8#
- 1...Bc4
- 2.Qd4#
- 1...Bb5
- 2.Qxd8#
- 1...Bf5
- 2.Qxd8#
- 1...Ba6
- 2.Qxd8#
- 1...Bxg6
- 2.Qxd8#
- 1...Bf1
- Tries
- 1.Bf6+?
- 1...Kg3
- 2.Qf3#
- 1...Bxf6!
- 1...Kg3
- 1.Rxb4+?
- 1...Bc4
- 2.Rxc4#
- 2.Qd4#
- 2.Qxd8#
- 1...Be4
- 2.Rxe4#
- 2.Qxd8#
- 1...Rxb4!
- 1...Bc4
- 1.Rf4+?
- 1...Kg3
- 2.Qf3#
- 1...Qxf4!
- 1...Kg3
- 1.Qf3?
- threat
- 2.Bg3#
- 2.Qg3#
- 1...Bxg6
- 2.Bg3#
- 1...Qf4
- 2.Raxf4#
- 2.Rfxf4#
- 2.Qxf4#
- 1...Bf1
- 2.Bg3#
- 1...Bc2
- 2.Bg3#
- 1...Be2
- 2.Bg3#
- 1...Bc4
- 2.Bg3#
- 2.Qe4#
- 2.Qf4#
- 1...Be4
- 2.Bg3#
- 2.Rf4#
- 2.Qf4#
- 1...Bb5
- 2.Bg3#
- 1...Bf5
- 2.Bg3#
- 1...Ba6
- 2.Bg3#
- 1...Bc7
- 2.Bf6#
- 2.Qg3#
- 2.Qf6#
- 1...h1S!
- threat
- 1.Qxd3?
- threat
- 2.Bg3#
- 2.Qxd8#
- 1...Rxa4
- 2.Bg3#
- 2.Qg3#
- 1...h1S
- 2.Qxd8#
- 1...Qd4
- 2.Bg3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Qf4
- 2.Raxf4#
- 2.Rfxf4#
- 1...Rd1
- 2.Bg3#
- 2.Rxb4#
- 1...Ba5
- 2.Bg3#
- 2.Bf6#
- 1...Bg5
- 2.Bg3#
- 1...Bb6
- 2.Bg3#
- 2.Bf6#
- 1...Bf6
- 2.Bg3#
- 2.Bxf6#
- 1...Bc7
- 2.Bf6#
- 1...Be7
- 2.Bg3#
- 1...Rxd3!
- threat
- 1.Bf6+?
- Keys
- 1.Sh1!
- threat
- 2.Bg3#
- 1...Bxg6
- 2.Qxd8#
- 1...Qf4
- 2.Raxf4#
- 2.Rfxf4#
- 1...Bf1
- 2.Qxd8#
- 1...Bc2
- 2.Qxd8#
- 1...Be2
- 2.Qxd8#
- 1...Bc4
- 2.Qd4#
- 1...Be4
- 2.Rf4#
- 1...Bb5
- 2.Qxd8#
- 1...Bf5
- 2.Qxd8#
- 1...Ba6
- 2.Qxd8#
- 1...Bc7
- 2.Bf6#
- threat
- 1.Sh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(d);OGATE::QAB(A),XB(h)
- B(d);N_SPINQ(e),OGATE,P_PINR(H)::QAR(A)
- B(d);OGATE,XP(G)::QAB(A),XB(h)
- Tries
- Try
- B(F);CHECK
- Vars
- K(f);N_SPINQ(e),S_FLIGHT::QAR1(A)
- Refutation
- B(h);XB(F)
- Try
- R(E);CHECK,XQ(e)
- Refutation
- R(a);XR(E)
- Try
- R(H);CHECK,N_PINQ(e)
- Vars
- K(f);S_FLIGHT::QAR1(A)
- Refutation
- Q(e);P_SPINQ(e),XR(H)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(d);XP(G)::B(F)
- B(d);::B(F)
- Refutation
- P(b);
- Try
- Q(A);XB(d)
- Threat
- DUALS(2)
- Vars
- P(b);::QAB(A),XB(h)
- B(h);::B(F)
- B(h);N_GUARD::B(F)
- Refutation
- R(c);XQ(A)
- Try
- Actual
- S(B);
- Threat
- B(F)
- Vars
- B(d);OGATE,XP(G)::QAB(A),XB(h)
- B(d);OGATE::QAB(A),XB(h)
- B(d);N_SPINQ(e),OGATE,P_PINR(H)::QAR(A)
- B(d);N_SPINQ(e),S_CUTQ(e)::R(H)
- B(h);N_GUARD::B(F)
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