MESON Chess Problem Database
Problem Display
PID: 54314 (K4B2/7p/Qbp2p2/1rPkNP2/1p1nnpN1/8/8/2RR3B w - - 0 1)
Boyer, Jean-Pierre
The Problemist, 1981
#2
10 + 10
| 56 | The Problemist | 2004 |
| 56 | The Problemist | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Ba5
- 2.Qxc6#
- 1...Bxc5
- 2.Qxc6#
- 1...Ba7
- 2.Qxc6#
- 1...Bc7
- 2.Qxc6#
- 1...Bd8
- 2.Qxc6#
- 1...fxe5
- 2.Sf6#
- 1...Ba5
- Tries
- 1.Sd3?
- threat
- 2.Sxf4#
- 2.Sxf6#
- 1...Sxf5
- 2.Sxf4#
- 1...Se2
- 2.Sxb4#
- 2.Sxf4#
- 1...Sb3
- 2.Sxb4#
- 2.Sxf4#
- 1...Sf3
- 2.Sxb4#
- 2.Sxf4#
- 1...Se6
- 2.Sxb4#
- 2.Sxf4#
- 1...Bc7
- 2.Sxf6#
- 1...Bd8
- 2.Sxf4#
- 1...f3
- 2.Sf4#
- 2.Se3#
- 1...Sc2!
- threat
- 1.Sf3?
- threat
- 2.Rxd4#
- 1...Sd2
- 2.Sxf6#
- 1...Bxc5!
- threat
- 1.Sc4?
- threat
- 2.Sxf6#
- 1...f3
- 2.Sce3#
- 2.Sge3#
- 1...Bd8!
- threat
- 1.Sg6?
- threat
- 2.Sxf6#
- 2.Sxf4#
- 2.Se7#
- 1...Rxc5
- 2.Sxf6#
- 2.Sxf4#
- 1...Bxc5
- 2.Sxf6#
- 2.Sxf4#
- 1...Bc7
- 2.Sxf6#
- 2.Se7#
- 1...Bd8
- 2.Sxf4#
- 1...f3
- 2.Se3#
- 2.Sf4#
- 2.Se7#
- 1...hxg6!
- threat
- 1.Sd7?
- threat
- 2.Sgxf6#
- 2.Sdxf6#
- 1...f3
- 2.Se3#
- 1...Bd8!
- threat
- 1.Sf7?
- threat
- 2.Sxf6#
- 1...f3
- 2.Se3#
- 1...Bd8!
- threat
- 1.Bd6?
- threat
- 2.Sxf6#
- 1...Bxc5
- 2.Qxc6#
- 1...fxe5
- 2.Sf6#
- 1...Bd8
- 2.Qxc6#
- 1...f3
- 2.Se3#
- 1...Rxc5!
- threat
- 1.Rc4?
- threat
- 2.Rdxd4#
- 2.Rcxd4#
- 1...Bxc5
- 2.Qxc6#
- 1...fxe5!
- threat
- 1.Qxb5?
- threat
- 2.Qc4#
- 2.Qxc6#
- 1...fxe5
- 2.Sf6#
- 2.Qc4#
- 1...cxb5!
- threat
- 1.Qb7?
- threat
- 2.Qxc6#
- 2.Qd7#
- 2.Qf7#
- 1...Rxc5
- 2.Qd7#
- 2.Qf7#
- 1...Bxc5
- 2.Qxc6#
- 2.Qf7#
- 1...fxe5
- 2.Sf6#
- 2.Qd7#
- 2.Qf7#
- 1...Bc7
- 2.Qxc6#
- 1...f3
- 2.Qxc6#
- 2.Qf7#
- 1...Ra5+!
- threat
- 1.Qc8?
- threat
- 2.Qe6#
- 2.Qd7#
- 2.Qxc6#
- 1...Rxc5
- 2.Qe6#
- 2.Qd7#
- 1...Bxc5
- 2.Qe6#
- 2.Qxc6#
- 1...fxe5
- 2.Sf6#
- 2.Qe6#
- 2.Qd7#
- 1...Bc7
- 2.Qe6#
- 1...f3
- 2.Qe6#
- 2.Qxc6#
- 1...Ra5+!
- threat
- 1.Sd3?
- Keys
- 1.Sxc6!
- threat
- 2.Se7#
- 1...Kxc6
- 2.Qb7#
- 1...Rxc5
- 2.Sxb4#
- 1...Bxc5
- 2.Sxf6#
- 1...Bd8
- 2.Rxd4#
- threat
- 1.Sxc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- B(g);OGATE::QAB1(H),XP(h)
- B(g);OGATE,XP(E)::QAB1(H),XP(h)
- P(i);SBLOCK,XS(F)::S(D)
- Tries
- Try
- S(F);N_PINS(b),P_PINS(c)
- Threat
- DUALS(2)
- Vars
- S(b);XP(G)::R(B)+S(F),DCHECK,XP(d)
- B(g);::S(D),XP(i)
- B(g);::S(F),XP(d)
- Refutation
- S(b);
- Try
- S(F);
- Threat
- R1(B),XS(b)
- Vars
- S(c);N_GUARD,N_SPINS(b)::S(D),XP(i)
- Refutation
- B(g);XP(E)
- Try
- S(F);
- Threat
- S(D),XP(i)
- Refutation
- B(g);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- B(g);::S(F),XP(d)
- Refutation
- P(j);XS(F)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- P(d);N_GUARD::S(D)
- Refutation
- B(g);
- Try
- S(F);
- Threat
- S(D),XP(i)
- Vars
- P(d);N_GUARD::S(D)
- Refutation
- B(g);
- Try
- B(J);
- Threat
- S(D),XP(i)
- Vars
- B(g);OGATE,XP(E)::QAB1(H),XP(h)
- P(i);XS(F)::S(D)
- B(g);OGATE::QAB1(H),XP(h)
- P(d);N_GUARD::S(D)
- Refutation
- R(e);XP(E)
- Try
- R(A);
- Threat
- DUALS(2)
- Vars
- B(g);OGATE,XP(E)::QAB1(H),XP(h)
- Refutation
- P(i);XS(F)
- Try
- Q(H);XR(e)
- Threat
- DUALS(2)
- Refutation
- P(h);XQ(H)
- Try
- Q(H);P_PINP(h)
- Threat
- DUALS(3)
- Vars
- B(g);::QAB1(H),XP(h)
- Refutation
- R(e);CHECK
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- B(g);::QAB1(H)
- Refutation
- R(e);CHECK
- Try
- Actual
- S(F);XP(h)
- Threat
- S(F)
- Vars
- K(f);N_SPINS(b),OGATEB,P_SPINB(g),P_SPINS(c),S_FLIGHT,XS(F)::QAB1(H)
- R(e);N_GUARD,XP(E)::S(F),XP(a)
- B(g);XP(E)::S(D),XP(i)
- B(g);::R1(B),XS(b)
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