MESON Chess Problem Database

Problem Display
PID: 276575 (5NK1/1bp5/3p4/pBPkpp2/pP1P4/2P2P2/8/7Q w - - 0 1)

Casa, Alex

Phenix, 2004

5NK1/1bp5/3p4/pBPkpp2/pP1P4/2P2P2/8/7Q

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.f4#
  • Tries
    • 1.Bc4+?
      • 1...Kc6
        • 2.b5#
        • 2.d5#
      • 1...Kxc4!
    • 1.Qg1?
      • threat
        • 2.c4#
      • 1...exd4
        • 2.Qxd4#
      • 1...dxc5!
    • 1.Qh2?
      • threat
        • 2.Qa2#
      • 1...exd4
        • 2.c4#
      • 1...dxc5
        • 2.Qxe5#
      • 1...axb4!
    • 1.Qh7?
      • threat
        • 2.Qf7#
      • 1...exd4
        • 2.Qxf5#
      • 1...dxc5
        • 2.Qd7#
      • 1...Bc8!
  • Keys
    • 1.Qd1!
      • threat
        • 2.c4#
      • 1...exd4
        • 2.Qxd4#
      • 1...dxc5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD,XP(E)::QAB(A)+P(C)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • K(c);S_FLIGHT,XB(F)
    • Try
      • Q(A);
      • Threat
        • P(B)
      • Vars
        • P(d);OGATE,XP(E)::QAR1(A),XP(d)
      • Refutation
        • P(f);XP(G)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(d);SBLOCK,XP(E)::P(B)
        • P(f);N_GUARD,XP(G)::QAR1(A),XP(d)
      • Refutation
        • P(b);XP(D)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(d);OGATEB,XP(E)::QAR2(A),XP(e)
        • P(f);OGATEB,XP(G)::QAR2(A)
      • Refutation
        • B(g);
  • Actual
    • Q(A);
    • Threat
      • P(B)
    • Vars
      • P(d);OGATE,P_SPINP(d),XP(E)::QAR1(A),XP(d)
      • P(f);OGATE,XP(G)::QAR(A)+P(E),XP(f)
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