MESON Chess Problem Database
Problem Display
PID: 268569 (2Q5/2Np1P2/PPBKp3/8/Nrk2pnR/P3P3/1nP1P3/4b3 w - - 0 1)
Bakker, Peter Arie
Schogt, JCM
Probleemblad, 1986
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Rb5
- 2.Bxb5#
- 1...Sd3
- 2.exd3#
- 1...Sh2
- 2.Rxf4#
- 1...Sxe3
- 2.Rxf4#
- 1...Se5
- 2.Rxf4#
- 1...Sh6
- 2.Rxf4#
- 1...fxe3
- 2.Rxg4#
- 1...f3
- 2.Rxg4#
- 1...e5
- 2.Bd5#
- 1...dxc6
- 2.Qxe6#
- 1...Rb5
- Tries
- 1.Sb5?
- threat
- 2.Bxd7#
- 1...Rxb5
- 2.Bd5#
- 1...dxc6
- 2.Qxc6#
- 1...Sd3
- 2.exd3#
- 1...Se5
- 2.Rxf4#
- 1...Sxa4!
- threat
- 1.Sd5?
- threat
- 2.Bxd7#
- 1...Rxb6
- 2.Saxb6#
- 2.Sdxb6#
- 1...Sxa4
- 2.Bxa4#
- 1...Sxe3
- 2.Rxf4#
- 1...fxe3
- 2.Rxg4#
- 1...dxc6
- 2.Qxc6#
- 1...Sd3
- 2.exd3#
- 1...Se5
- 2.Rxf4#
- 1...Rb5!
- threat
- 1.Sxe6?
- threat
- 2.Bxd7#
- 1...Sxa4
- 2.Bxa4#
- 1...dxc6
- 2.Qxc6#
- 1...dxe6
- 2.Bd7#
- 2.Be8#
- 2.Qxe6#
- 1...Rb5
- 2.Bd5#
- 1...Sd3
- 2.exd3#
- 1...Se5
- 2.Rxf4#
- 1...Rxb6!
- threat
- 1.Se8?
- threat
- 2.Bxd7#
- 1...Sxa4
- 2.Bxa4#
- 1...Sxe3
- 2.Rxf4#
- 1...fxe3
- 2.Rxg4#
- 1...dxc6
- 2.Qxc6#
- 1...Rb5
- 2.Bd5#
- 1...Sd3
- 2.exd3#
- 1...Se5
- 2.Rxf4#
- 1...Rxb6!
- threat
- 1.Qh8?
- threat
- 2.Qd4#
- 1...Sxe3
- 2.Rxf4#
- 1...fxe3
- 2.Rxg4#
- 1...Bc3
- 2.Qxc3#
- 1...Se5
- 2.Rxf4#
- 1...e5
- 2.Bd5#
- 1...Sf6!
- threat
- 1.Sb5?
- Keys
- 1.Sa8!
- threat
- 2.Bxd7#
- 1...Rxb6
- 2.S8xb6#
- 1...Sxa4
- 2.Bxa4#
- 1...Sxe3
- 2.Rxf4#
- 1...fxe3
- 2.Rxg4#
- 1...dxc6
- 2.Qxc6#
- 1...Rb5
- 2.Bd5#
- 1...Sd3
- 2.exd3#
- 1...Se5
- 2.Rxf4#
- threat
- 1.Sa8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- R(c);N_GUARD::B(I),XR(c)
- S(b);OGATE::P(B),XS(b)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
- S(f);OGATE,P_SPINP(e),XP(D)::R(F),XP(e)
- P(e);OGATEB,P_SPINS(f),XP(D)::R(F),XS(f)
- P(e);OGATEB,P_SPINS(f)::R(F),XS(f)
- P(g);N_GUARD::B(I)
- P(h);OGATE,XB(I)::QAB(M),XP(g)
- Tries
- Try
- S(K);
- Threat
- QAR(M)+B(I),XP(h)
- Vars
- R(c);SBLOCK,XS(K)::QAR(M)+B(I),DCHECK
- P(h);OGATE,P_SPINP(h),XB(I)::QAR2(M),XP(h)
- S(b);OGATE::P(B),XS(b)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
- Refutation
- S(b);XS(E)
- Try
- S(K);
- Threat
- QAR(M)+B(I),XP(h)
- Vars
- S(b);OGATE,XS(E)::QAR(M)+B(I),XS(b)
- S(f);OGATE,P_SPINP(e),XP(D)::R(F),XP(e)
- P(e);OGATEB,P_SPINS(f),XP(D)::R(F),XS(f)
- P(h);OGATE,P_SPINP(h),XB(I)::QAR2(M),XP(h)
- S(b);OGATE::P(B),XS(b)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
- Refutation
- R(c);
- Try
- S(K);XP(g)
- Threat
- QAR(M)+B(I),XP(h)
- Vars
- S(b);OGATE,XS(E)::QAR(M)+B(I),XS(b)
- P(h);OGATE,P_SPINP(h),XB(I)::QAR2(M),XP(h)
- R(c);SBLOCK::QAR(M)+B(I),DCHECK
- S(b);OGATE::P(B),XS(b)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
- Refutation
- R(c);P_PINB(I),XP(H)
- Try
- S(K);
- Threat
- QAR(M)+B(I),XP(h)
- Vars
- S(b);OGATE,XS(E)::QAR(M)+B(I),XS(b)
- S(f);OGATE,P_SPINP(e),XP(D)::R(F),XP(e)
- P(e);OGATEB,P_SPINS(f),XP(D)::R(F),XS(f)
- P(h);OGATE,P_SPINP(h),XB(I)::QAR2(M),XP(h)
- R(c);SBLOCK::QAR(M)+B(I),DCHECK
- S(b);OGATE::P(B),XS(b)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
- Refutation
- R(c);P_PINB(I),XP(H)
- Try
- Q(M);
- Threat
- QAR1(M)
- Vars
- S(f);OGATE,P_SPINP(e),XP(D)::R(F),XP(e)
- P(e);OGATEB,P_SPINS(f),XP(D)::R(F),XS(f)
- B(a);N_GUARD::QAR1(M),XB(a)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
- P(g);N_GUARD::B(I)
- Refutation
- S(f);P_SPINP(e)
- Try
- Actual
- S(K);
- Threat
- QAR(M)+B(I),XP(h)
- Vars
- R(c);P_PINB(I),XP(H)::S(K),XR(c)
- S(b);OGATE,XS(E)::QAR(M)+B(I),XS(b)
- S(f);OGATE,P_SPINP(e),XP(D)::R(F),XP(e)
- P(e);OGATEB,P_SPINS(f),XP(D)::R(F),XS(f)
- P(h);OGATE,P_SPINP(h),XB(I)::QAR2(M),XP(h)
- R(c);SBLOCK::QAR(M)+B(I),DCHECK
- S(b);OGATE::P(B),XS(b)
- S(f);OGATE,P_SPINP(e)::R(F),XP(e)
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