MESON Chess Problem Database
Problem Display
PID: 67038 (3Kn3/2PP3N/2Qqk1P1/1p6/4Bp1n/B1pP1N1b/4R3/r7 w - - 0 1)
Brotherton, David WA
3rd HM.=, The Observer, 1965
#2
11 + 9
| 136 | Problem Observer | 2006 |
SOLUTION
- SOUND
- Sets
- 1...Bf5
- 2.Bd5#
- 1...Sf5
- 2.Bd5#
- 1...Sxg6
- 2.Bxg6#
- 1...Sf6
- 2.Shg5#
- 2.Sf8#
- 2.Qxd6#
- 1...Sxc7
- 2.Qxd6#
- 1...Sg7
- 2.Qxd6#
- 1...Bf5
- Tries
- 1.Kxe8?
- threat
- 2.Qxd6#
- 2.d8S#
- 1...Rxa3
- 2.d8S#
- 1...Sxf3
- 2.Qxd6#
- 1...Sf5
- 2.Bd5#
- 2.d8S#
- 1...b4
- 2.d8S#
- 1...Qxc6!
- threat
- 1.Sxh4?
- threat
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 1...Qxc6
- 2.Bxc6#
- 1...Re1
- 2.Bd5#
- 2.Bf5#
- 1...Rh1
- 2.Bxh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 1...Ra2
- 2.Bd5#
- 2.Bf5#
- 1...Bf1
- 2.Bd5#
- 2.Bf5#
- 1...Bg2
- 2.Bxg2#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 1...Bg4
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 1...Bf5
- 2.Bd5#
- 2.Bxf5#
- 1...Sf6
- 2.Bd5#
- 2.Bf5#
- 2.Qxd6#
- 1...f3
- 2.Bxf3#
- 2.Bd5#
- 2.Bf5#
- 1...Ke5!
- threat
- 1.Bxd6?
- threat
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sxg6
- 2.Sfg5#
- 2.Bxg6#
- 2.Qd5#
- 1...Sxd6
- 2.Qd5#
- 1...Sxc7
- 2.Sd4#
- 2.Sfg5#
- 2.Ba3#
- 2.Bb4#
- 2.Bxf4#
- 2.Bc5#
- 2.Be5#
- 2.Bxc7#
- 2.Be7#
- 2.Bf8#
- 1...Rb1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rc1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rd1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Re1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rf1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rg1
- 2.Sd4#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rh1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra2
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra3
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra4
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra5
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra6
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra7
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bf1
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bg2
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bg4
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bf5
- 2.Sd4#
- 2.Sfg5#
- 2.Bd5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sg2
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sf5
- 2.Sfg5#
- 2.Bd5#
- 2.Qd5#
- 1...Sf6
- 2.Sd4#
- 2.Sfg5#
- 2.Shg5#
- 2.Sf8#
- 2.Ba3#
- 2.Bb4#
- 2.Bxf4#
- 2.Bc5#
- 2.Be5#
- 2.Be7#
- 2.Bf8#
- 1...Sg7
- 2.Sd4#
- 2.Sfg5#
- 2.Ba3#
- 2.Bb4#
- 2.Bxf4#
- 2.Bc5#
- 2.Be5#
- 2.Be7#
- 2.Bf8#
- 2.Qd5#
- 1...c2
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...b4
- 2.Sd4#
- 2.Sfg5#
- 2.Qd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra8+!
- threat
- 1.Qc4+?
- 1...Qd5
- 2.Qxd5#
- 1...bxc4!
- 1...Qd5
- 1.d4?
- threat
- 2.Sfg5#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.d5#
- 1...Qxc6
- 2.Sfg5#
- 1...Sxg6
- 2.Sfg5#
- 2.Bxg6#
- 1...Sxc7
- 2.Sfg5#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Qxd6#
- 1...Rb1
- 2.Sfg5#
- 2.Bxb1#
- 2.Bc2#
- 2.Bd3#
- 2.d5#
- 1...Rd1
- 2.Sfg5#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 1...Re1
- 2.Sfg5#
- 2.d5#
- 1...Rg1
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.d5#
- 1...Ra2
- 2.Sfg5#
- 2.Bc2#
- 2.d5#
- 1...Bf1
- 2.Sfg5#
- 2.d5#
- 1...Bf5
- 2.Sfg5#
- 2.Bd5#
- 2.d5#
- 1...Sg2
- 2.Sfg5#
- 2.d5#
- 1...Sf5
- 2.Sfg5#
- 2.Bd5#
- 2.d5#
- 1...Sf6
- 2.Sfg5#
- 2.Shg5#
- 2.Sf8#
- 2.Qxd6#
- 1...c2
- 2.Sfg5#
- 2.Bxc2#
- 2.Bd3#
- 2.d5#
- 1...Sxf3!
- threat
- 1.Kxe8?
- Keys
- 1.Kc8!
- threat
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ke7
- 2.Bf5#
- 1...Qxc6
- 2.d8S#
- 1...Rxa3
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sxf3
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sxg6
- 2.Bxg6#
- 1...Sxc7
- 2.Qxd6#
- 1...Rb1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rc1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rd1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Re1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rf1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rg1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rh1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Ra2
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bf1
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bg2
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bg4
- 2.dxe8Q#
- 2.dxe8R#
- 1...Bf5
- 2.Bd5#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sg2
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sf5
- 2.Bd5#
- 1...Sf6
- 2.Qxd6#
- 1...Sg7
- 2.Qxd6#
- 1...c2
- 2.dxe8Q#
- 2.dxe8R#
- 1...b4
- 2.dxe8Q#
- 2.dxe8R#
- threat
- 1.Kc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- B(c);SBLOCK::R(A)+B(E),DCHECK
- S(e);SBLOCK::R(A)+B(E),DCHECK
- S(e);OGATE,XP(G)::R(A)+B(E),XS(e)
- S(i);N_GUARD,XP(H)::QAR1(F),XQ(g)
- S(i);N_GUARD::QAR1(F),XQ(g)
- Tries
- Try
- K(K);N_SPINP(I),P-FLIGHT,XS(i)
- Threat
- DUALS(2)
- Vars
- R(a);XB(B)::P=S
- S(e);XS(D)::QAR1(F),XQ(g)
- P(f);::P=S
- Refutation
- Q(g);N_SPINQ(g),P_PINP(I),XQ(F)
- Try
- S(D);XS(e)
- Threat
- DUALS(5)
- Vars
- Q(g);N_PINP(I),N_SPINQ(g),OGATE,XQ(F)::R(A)+B(E),XQ(g)
- Refutation
- K(h);N_SPINQ(g),P-FLIGHT
- Try
- B(B);N_SPINP(I),XQ(g)
- Threat
- DUALS(5)
- Vars
- S(i);P_SPINS(i),XB(B)::QAB1(F)
- Refutation
- R(a);CHECK
- Try
- Q(F);CHECK,N_PINQ(g)
- Vars
- Q(g);N_GUARD,P_SPINQ(g)::QAB1(F),XQ(g)
- Refutation
- P(f);XQ(F)
- Try
- P(C);
- Threat
- DUALS(5)
- Vars
- Q(g);N_PINP(I),N_SPINQ(g),XQ(F)::S(D)
- Refutation
- S(e);XS(D)
- Try
- Actual
- K(K);N_SPINP(I),P-FLIGHT
- Threat
- PXS(i)=Q
- Vars
- K(h);P-FLIGHT,P_PINP(I)::R(A)+B(E)
- Q(g);N_SPINQ(g),P_PINP(H),XQ(F)::P=S
- R(a);XB(B)::PXS(i)=Q
- S(e);XS(D)::PXS(i)=Q
- S(e);OGATE,XP(G)::R(A)+B(E),XS(e)
- S(i);N_GUARD,XP(H)::QAR1(F),XQ(g)
- R(a);::PXS(i)=Q
- B(c);::PXS(i)=Q
- S(e);::PXS(i)=Q
- S(e);SBLOCK::R(A)+B(E),DCHECK
- S(i);N_GUARD::QAR1(F),XQ(g)
- P(b);::PXS(i)=Q
- P(f);::PXS(i)=Q
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