MESON Chess Problem Database
Problem Display
PID: 81760 (1b6/2pR4/K1kP1Nn1/2P2p2/2R1p3/2PN4/2n4p/7B w - - 0 1)
Lipton, Michael
Problem Observer, 2009
#2
9 + 8
| 56 | The Problemist | 2009 |
| 56 | The Problemist | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Ba7
- 2.Rxc7#
- 1...Sa1
- 2.Sb4#
- 1...Se1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sb4+
- 2.Sxb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...f4
- 2.Bxe4#
- 1...cxd6
- 2.cxd6#
- 1...Ba7
- Tries
- 1.Re7?
- 1...Sb4+
- 2.Sxb4#
- 1...Sxe7
- 2.Se5#
- 1...Sa1
- 2.Sb4#
- 1...Ba7
- 2.Rxc7#
- 1...Se1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...f4
- 2.Bxe4#
- 1...cxd6!
- 1...Sb4+
- 1.Rf7?
- 1...Sb4+
- 2.Sxb4#
- 1...Sa1
- 2.Sb4#
- 1...Ba7
- 2.Rxc7#
- 1...Se1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...f4
- 2.Bxe4#
- 1...cxd6!
- 1...Sb4+
- 1.Rg7?
- 1...Sb4+
- 2.Sxb4#
- 1...Sa1
- 2.Sb4#
- 1...Ba7
- 2.Rxc7#
- 1...Se1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...f4
- 2.Bxe4#
- 1...cxd6!
- 1...Sb4+
- 1.Rh7?
- 1...Sb4+
- 2.Sxb4#
- 1...Sa1
- 2.Sb4#
- 1...Ba7
- 2.Rxc7#
- 1...Se1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...f4
- 2.Bxe4#
- 1...cxd6!
- 1...Sb4+
- 1.Rd8?
- 1...Sb4+
- 2.Sxb4#
- 1...cxd6
- 2.cxd6#
- 1...Sa1
- 2.Sb4#
- 1...Se1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...f4
- 2.Bxe4#
- 1...Ba7!
- 1...Sb4+
- 1.dxc7?
- threat
- 2.cxb8S#
- 1...Sb4+
- 2.Sxb4#
- 1...Ba7
- 2.c8Q#
- 2.c8R#
- 1...Bxc7!
- threat
- 1.Re7?
- Keys
- 1.Rxe4!
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Re5#
- 2.Re6#
- 2.Ree7#
- 2.Re8#
- 1...Sb4+
- 2.Rxb4#
- 1...fxe4
- 2.Bxe4#
- 1...cxd6
- 2.Re6#
- 1...Se1
- 2.Rxe1#
- 1...Se3
- 2.Rxe3#
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Rexe7#
- 1...f4
- 2.Rxf4#
- threat
- 1.Rxe4!
This is after 17641
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 10
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- B(h);N_GUARD::R1(I),XP(g)
- S(a);N_GUARD::S(C)
- S(a);CHECK,N_GUARD::S(C),XS(a)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::B(A),XP(c)
- P(g);OGATE,XP(G)::R(D)+P(E),XP(g)
- Tries
- Try
- R(I);
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- S(f);N_GUARD,XR(I)::S(C)
- S(a);N_GUARD::S(C)
- B(h);N_GUARD::R1(I),XP(g)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::B(A),XP(c)
- Refutation
- P(g);XP(G)
- Try
- R(I);
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- B(h);N_GUARD::R1(I),XP(g)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::B(A),XP(c)
- Refutation
- P(g);XP(G)
- Try
- R(I);
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- B(h);N_GUARD::R1(I),XP(g)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::B(A),XP(c)
- Refutation
- P(g);XP(G)
- Try
- R(I);
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- B(h);N_GUARD::R1(I),XP(g)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::B(A),XP(c)
- Refutation
- P(g);XP(G)
- Try
- R(I);
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- P(g);OGATE,XP(G)::R(D)+P(E),XP(g)
- S(a);N_GUARD::S(C)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::B(A),XP(c)
- Refutation
- B(h);
- Try
- P(G);XP(g)
- Threat
- PXB(h)=S
- Vars
- S(a);CHECK,N_GUARD::S(C),XS(a)
- B(h);N_GUARD::P=Q
- Refutation
- B(h);XP(G)
- Try
- Actual
- R(D);XP(c)
- Threat
- DUALS(14)
- Vars
- S(a);CHECK::B(A)+R(D),XS(a)
- P(d);OGATE,P_SPINP(d),XR(D)::B(A),XP(d)
- P(g);XP(G)::B(A)+R(D)
- S(a);::B(A)+R(D),XS(a)
- S(f);::B(A)+R(D),XS(f)
- P(d);::B(A)+R(D),XP(d)
Developed and maintained by Brian Stephenson.
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