MESON Chess Problem Database

Problem Display
PID: 271505 (8/8/pp6/k1P2Q2/8/K7/8/8 w - - 0 1)

Turke, SE

The Problemist, 1956

8/8/pp6/k1P2Q2/8/K7/8/8

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...bxc5
      • 2.Qxc5#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qb4#
        • 2.Qxb6#
      • 1...b5
        • 2.Qb4#
      • 1...bxc5!
    • 1.Qd3?
      • 1...b5
        • 2.Qd8#
      • 1...bxc5!
    • 1.Qd7?
      • threat
        • 2.Qa4#
      • 1...b5
        • 2.Qc7#
        • 2.Qd8#
      • 1...bxc5!
    • 1.Qc8?
      • 1...bxc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qc7#
        • 2.Qd8#
      • 1...Kb5!
    • 1.Qe5?
      • 1...bxc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qc7#
      • 1...Kb5!
    • 1.Qg5?
      • 1...bxc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qd8#
      • 1...Kb5!
    • 1.Qf8?
      • 1...bxc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qd8#
      • 1...Kb5!
  • Keys
    • 1.Qd5!
      • 1...Kb5
        • 2.c6#
      • 1...bxc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,P_SPINP(c),XP(B)::QAR2(C),XP(c)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB1(C)
      • Refutation
        • P(c);XP(B)
    • Try
      • Q(C);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);XP(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Refutation
        • P(c);XP(B)
    • Try
      • Q(C);
      • Vars
        • P(c);OGATE,XP(B)::QAR2(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(c);OGATE,P_SPINP(c),XP(B)::QAR2(C),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(c);OGATE,P_SPINP(c),XP(B)::QAR2(C),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(c);OGATE,XP(B)::QAR2(C),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,S_CUTP(c)::QAR(C)+P(B)
      • P(c);OGATE,P_SPINP(c),XP(B)::QAR2(C),XP(c)
      • P(c);OGATEB,SBLOCK::QAB(C)
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