MESON Chess Problem Database

Problem Display
PID: 157476 (3kN3/3b4/3N2p1/3Q2K1/8/8/8/8 w - - 0 1)

Godbout, Alain J

Matou, 1990

3kN3/3b4/3N2p1/3Q2K1/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2016
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5?
      • 1...Kc8
        • 2.Qa8#
      • 1...Kxe8
        • 2.Qg8#
      • 1...gxf5!
    • 1.Qf7?
      • threat
        • 2.Qf6#
      • 1...Bh3
        • 2.Qc7#
      • 1...Ba4
        • 2.Qc7#
      • 1...Bg4
        • 2.Qc7#
      • 1...Bb5
        • 2.Qc7#
      • 1...Bf5
        • 2.Qc7#
      • 1...Bc6
        • 2.Qc7#
      • 1...Be6
        • 2.Qc7#
      • 1...Bc8
        • 2.Qc7#
      • 1...Bxe8!
  • Keys
    • 1.Sc8!
      • 1...Kxc8
        • 2.Qa8#
      • 1...Kxe8
        • 2.Qg8#

Anticipated by 243661(1985)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);P_PINB(b)
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR2(A)
        • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(A)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • B(b);OGATE::QAB1(A)
      • Refutation
        • B(b);XS(D)
  • Actual
    • S(C);P_PINB(b)
    • Vars
      • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(C)::QAR2(A)
      • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(A)
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