MESON Chess Problem Database

Problem Display
PID: 260766 (r7/qNR2P2/3P4/1P1k1BR1/r1NP4/2P5/P3P2p/2KQ2bb w - - 0 1)

Paslack, Rainer

2nd HM., Neue Zurcher Zeitung, 2006

r7/qNR2P2/3P4/1P1k1BR1/r1NP4/2P5/P3P2p/2KQ2bb

#2

14 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Rc5#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qb6
      • 2.Sxb6#
    • 1...Qb8
      • 2.Sb6#
      • 2.Rc5#
    • 1...Qa5
      • 2.Rc5#
    • 1...Qa6
      • 2.Rc5#
    • 1...Qxb7
      • 2.Rc5#
    • 1...Rg8
      • 2.fxg8Q#
      • 2.fxg8B#
    • 1...Bf2
      • 2.Qxh1#
    • 1...Be3+
      • 2.Sxe3#
    • 1...Bxd4
      • 2.Qxh1#
  • Tries
    • 1.Be4+?
      • 1...Ke6
        • 2.Rg6#
      • 1...Kxe4!
    • 1.Be6+?
      • 1...Ke4
        • 2.Rg4#
      • 1...Kxe6!
    • 1.Qd3?
      • threat
        • 2.Bh3#
        • 2.Bg4#
        • 2.Bd7#
        • 2.Bc8#
      • 1...Be3+
        • 2.Sxe3#
      • 1...Rc8
        • 2.Bh3#
        • 2.Bg4#
        • 2.Bd7#
        • 2.Bxc8#
      • 1...Rg8
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Be4
        • 2.Qxe4#
      • 1...Re8!
  • Keys
    • 1.Re7!
      • threat
        • 2.Bd3#
      • 1...Be3+
        • 2.Sxe3#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Qxd4
        • 2.Sb6#
      • 1...Bxd4
        • 2.Se3#
      • 1...Rg8
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Be4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD,P_SPINQ(f),XP(G)::R1(M)
    • Q(f);N_GUARD::R1(M),XQ(f)
    • Q(f);N_GUARD::S(F),XQ(f)
    • Q(f);N_GUARD::R1(M)
    • Q(f);N_GUARD,XS(L)::R1(M)
    • R(g);OGATE::PXR(g)=Q
    • B(a);OGATE::QAB(B),XB(b)
    • B(a);CHECK,N_GUARD::S(F),XB(a)
    • B(a);OGATE,P_SPINB(a),XP(G)::QAB(B),XB(b)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • K(e);N_GUARD,S_CUTB(b),S_FLIGHT::R(J)
      • Refutation
        • K(e);S_FLIGHT,XB(I)
    • Try
      • B(I);CHECK
      • Vars
        • K(e);N_GUARD,S_FLIGHT::R(J)
      • Refutation
        • K(e);S_FLIGHT,XB(I)
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Vars
        • B(a);CHECK,N_GUARD::S(F),XB(a)
        • R(g);OGATE::PXR(g)=Q
        • B(b);N_GUARD::QAB1(B),XB(b)
      • Refutation
        • R(g);
  • Actual
    • R(M);
    • Threat
      • R(J)+B(I)
    • Vars
      • B(a);CHECK,N_GUARD::S(F),XB(a)
      • K(e);OGATEB,S_FLIGHT,XS(F)::QAB1(B)
      • Q(f);N_GUARD,P_SPINQ(f),XP(G)::S(F)
      • B(a);N_GUARD,P_SPINB(a),XP(G)::S(F)
      • R(g);OGATE::PXR(g)=Q
      • B(b);SBLOCK::R(J)+B(I),DCHECK
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