MESON Chess Problem Database

Problem Display
PID: 157478 (5N2/8/2p2p2/4k3/3R4/8/7K/Q7 w - - 0 1)

Godbout, Alain J

Schach-WW, 1994

5N2/8/2p2p2/4k3/3R4/8/7K/Q7

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qc5#
      • 1...Kf5
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...f5!
    • 1.Qa3?
      • threat
        • 2.Qc5#
      • 1...Kf5
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...f5
        • 2.Qd6#
      • 1...Kxd4!
    • 1.Qa5+?
      • 1...c5
        • 2.Qxc5#
      • 1...Kxd4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qc5#
      • 1...Kf5
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...f5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(b);::QAR2(A),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(b);::QAR2(A),XP(b)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR2(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);P-FLIGHT::QAR(A)
      • P(b);::QAR2(A),XP(b)
      • P(c);OGATEB,SBLOCK::QAB(A)
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