MESON Chess Problem Database

Problem Display
PID: 116090 (8/1p2rp1b/4kpp1/3R1R2/4P3/1P4K1/4Q3/8 w - - 0 1)

Godbout, Alain J

LeDroit, 1980

8/1p2rp1b/4kpp1/3R1R2/4P3/1P4K1/4Q3/8

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qb6#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Re8
        • 2.Qd7#
        • 2.Qxe8#
      • 1...b6
        • 2.Qc6#
        • 2.Qxb6#
      • 1...Rc7!
    • 1.Qa6+?
      • 1...b6
        • 2.Qxb6#
      • 1...bxa6!
    • 1.Qb2?
      • threat
        • 2.Rxf6#
        • 2.Qxf6#
      • 1...Rc7
        • 2.Qxf6#
      • 1...Rd7
        • 2.Qxf6#
      • 1...Re8
        • 2.Qxf6#
      • 1...gxf5!
  • Keys
    • 1.e5!
      • threat
        • 2.exf6#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kxf5
        • 2.Qg4#
        • 2.e6#
      • 1...fxe5
        • 2.Qxe5#
      • 1...gxf5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • R(e);N_GUARD::QAB1(A),XR(e)
      • Refutation
        • R(e);
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAR(A),XP(d)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::QAR1(A),XP(b)
      • Refutation
        • P(c);XR(F)
  • Actual
    • P(D);
    • Threat
      • QAR(A)+P(D),XP(b)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(E)::QAB1(A)
      • P(b);OGATE,P_SPINP(b),XP(D)::QAR1(A),XP(b)
      • P(c);SBLOCK,XR(F)::R1(E)
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