MESON Chess Problem Database

Problem Display
PID: 268148 (8/B1pN1p1p/6PN/6pb/KQ1PrkpR/1R3p1r/3P3P/7B w - - 0 1)

van Gool, Johann Christoffel

1st HM., KeyStip 21. Ty., 1979

8/B1pN1p1p/6PN/6pb/KQ1PrkpR/1R3p1r/3P3P/7B

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.Rxf3#
    • 1...Rxd4
      • 2.Qxd4#
    • 1...Re5
      • 2.dxe5#
    • 1...Bxg6
      • 2.Rxg4#
    • 1...fxg6
      • 2.Qf8#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qf5#
      • 1...Rxd4+
        • 2.Qxd4#
      • 1...Rxh2
        • 2.Rxf3#
      • 1...Bxg6
        • 2.Rxg4#
      • 1...fxg6
        • 2.Qf8#
      • 1...Re5
        • 2.Qxe5#
      • 1...f5
        • 2.Qxf5#
      • 1...hxg6!
    • 1.Qd6+?
      • 1...Re5
        • 2.Qxe5#
      • 1...cxd6!
  • Keys
    • 1.d5!
      • threat
        • 2.Be3#
      • 1...Rxb4+
        • 2.Rxb4#
      • 1...Rxh2
        • 2.Rxf3#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...f2
        • 2.Qxe4#
      • 1...c5
        • 2.Bb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD,XP(C)::R1(D),XP(a)
    • R(c);OGATE,P_PINQ(F),P_SPINR(c),XP(G)::QAR2(F),XR(c)
    • R(c);OGATE::QAR(F)+P(G),XR(c)
    • B(g);N_GUARD,XP(I)::R1(H),XP(e)
    • P(i);OGATEB,XP(I)::QAR(F)
  • Tries
    • Try
      • Q(F);P_SPINP(G)
      • Threat
        • QAR1(F)
      • Vars
        • R(c);CHECK,OGATE,XP(G)::QAR2(F),XR(c)
        • R(b);N_GUARD,XP(C)::R1(D),XP(a)
        • B(g);N_GUARD,XP(I)::R1(H),XP(e)
        • P(i);OGATEB,XP(I)::QAR(F)
        • R(c);N_GUARD,N_PINP(G)::QAB1(F),XR(c)
        • P(i);::QAR1(F),XP(i)
      • Refutation
        • P(j);XP(I)
    • Try
      • Q(F);CHECK,P_SPINP(G)
      • Vars
        • R(c);N_GUARD,N_PINP(G),P_SPINR(c)::QAB1(F),XR(c)
      • Refutation
        • P(h);XQ(F)
  • Actual
    • P(G);P_PINR(c),P_SPINQ(F)
    • Threat
      • B(K)
    • Vars
      • R(c);CHECK,N_SPINR(c),OGATE,XQ(F)::R(D),XR(c)
      • R(b);N_GUARD,XP(C)::R1(D),XP(a)
      • R(c);::QAR(F),XR(c)
      • R(c);::QAR2(F),XR(c)
      • P(a);::QAR1(F),XR(c)
      • P(h);OGATEB::B(K)
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