MESON Chess Problem Database

Problem Display
PID: 171048 (B7/3p1Q2/1Bqp4/2n1P3/R1bk2N1/n1p2P2/2p4K/2N5 w - - 0 1)

Seider, Shlomo

2nd Prize, Israel Ring Ty., 1988

B7/3p1Q2/1Bqp4/2n1P3/R1bk2N1/n1p2P2/2p4K/2N5

#2

9 + 9

721 Variantim 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Qf4#
    • 1...Qb5
      • 2.Qd5#
      • 2.Qf4#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qxb6
      • 2.Qd5#
    • 1...Qc7
      • 2.Qd5#
      • 2.Qf4#
    • 1...Qc8
      • 2.Qd5#
      • 2.Qf4#
    • 1...Sb1
      • 2.Rxc4#
      • 2.Qxc4#
    • 1...Sb5
      • 2.Rxc4#
      • 2.Qxc4#
    • 1...d5
      • 2.Qf4#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Qd5#
        • 2.Qf4#
      • 1...dxe5
        • 2.Qd5#
        • 2.Qxd7#
      • 1...d5
        • 2.Qxd5#
        • 2.Qf4#
      • 1...dxc6!
    • 1.Qf4+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Qf5?
      • threat
        • 2.Qd3#
      • 1...Qxf3
        • 2.Sb3#
      • 1...Qxa4
        • 2.Qe4#
        • 2.Qf4#
      • 1...Qxb6
        • 2.Se2#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Qh7?
      • threat
        • 2.Qd3#
      • 1...Qxf3
        • 2.Sb3#
      • 1...Qxa4
        • 2.Qe4#
      • 1...Qxb6
        • 2.Se2#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Kd5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qd3#
      • 1...Kd5
        • 2.Qxd6#
      • 1...Qxf3
        • 2.Sb3#
      • 1...Qxa4
        • 2.Qe4#
      • 1...Qxb6
        • 2.Se2#
      • 1...Qe4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(g);N_GUARD,N_SPINB(d),XR(D)::QAR2(H)
    • Q(g);N_GUARD::QAR1(H),XQ(g)
    • Q(g);N_GUARD,N_SPINS(f),XB(G)::QAR1(H)
    • P(h);SBLOCK,S_CUTQ(g)::QAR2(H)
  • Tries
    • Try
      • B(I);XQ(g)
      • Threat
        • DUALS(2)
      • Refutation
        • P(i);XB(I)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAR1(H),XQ(g)
      • Refutation
        • K(e);N_SPINB(d),N_SPINS(f),P-FLIGHT,P_SPINQ(g)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • Q(g);XP(C)::S(A)
        • Q(g);N_SPINS(f),XB(G)::S(A)
        • Q(g);N_GUARD::QAR1(H),XQ(g)
      • Refutation
        • K(e);N_SPINB(d),N_SPINS(f),P-FLIGHT,P_SPINQ(g)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • Q(g);XP(C)::S(A)
        • Q(g);N_GUARD,N_SPINB(d),XR(D)::QAR1(H)
        • Q(g);N_SPINS(f),XB(G)::S(A)
        • Q(g);N_GUARD::QAR1(H),XQ(g)
      • Refutation
        • K(e);N_SPINB(d),N_SPINS(f),P-FLIGHT,P_SPINQ(g)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(e);N_SPINB(d),N_SPINS(f),P-FLIGHT,P_SPINQ(g)::QAR1(H),XP(h)
      • Q(g);XP(C)::S(A)
      • Q(g);N_GUARD,N_SPINB(d),XR(D)::QAR1(H)
      • Q(g);N_SPINS(f),XB(G)::S(A)
      • Q(g);N_GUARD::QAR1(H),XQ(g)
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