MESON Chess Problem Database

Problem Display
PID: 39963 (8/2N1pp2/3B1k2/2P5/4p1R1/4N3/5P2/K4Q2 w - - 0 1)

Anonymous

Source?, 0000

8/2N1pp2/3B1k2/2P5/4p1R1/4N3/5P2/K4Q2

#2

8 + 4

136 Problem Observer 1972

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Se8#
  • Tries
    • 1.Bg3?
      • 1...e5
        • 2.Bh4#
      • 1...e6!
    • 1.Qd1?
      • 1...exd6
        • 2.Qxd6#
      • 1...e6
        • 2.Se8#
      • 1...e5!
    • 1.f3?
      • threat
        • 2.fxe4#
      • 1...exf3
        • 2.Qxf3#
      • 1...exd6!
    • 1.f4?
      • threat
        • 2.Be5#
      • 1...exf4 ep
        • 2.Qxf3#
      • 1...e5
        • 2.fxe5#
      • 1...e6
        • 2.Se8#
      • 1...exd6!
  • Keys
    • 1.Qa6!
      • 1...exd6
        • 2.Qxd6#
      • 1...e5
        • 2.Bf8#
      • 1...e6
        • 2.Se8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::S(H)
  • Tries
    • Try
      • B(G);
      • Vars
        • P(c);SBLOCK::B(G)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • P(c);OGATE,XB(G)::QAR2(B),XP(c)
        • P(c);SBLOCK::S(H)
      • Refutation
        • P(c);
    • Try
      • P(C);
      • Threat
        • QAR(B)+P(C),XP(a)
      • Vars
        • P(a);OGATE,P_SPINP(a),XP(C)::QAR(B),XP(a)
      • Refutation
        • P(c);XB(G)
    • Try
      • P(C);
      • Threat
        • B(G)
      • Vars
        • P(a);EP,OGATEB,P_SPINP(a),XP(C)::QAR(B),XP(a)
        • P(c);OGATE::QAR(B)+P(C)DCHECK,XP(c)
        • P(c);SBLOCK::S(H)
      • Refutation
        • P(c);XB(G)
  • Actual
    • Q(B);
    • Vars
      • P(c);OGATE,P_SPINP(c),XB(G)::QAR2(B),XP(c)
      • P(c);OGATE,SBLOCK::QAR(B)+B(G)
      • P(c);SBLOCK::S(H)
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