MESON Chess Problem Database

Problem Display
PID: 23725 (4K3/5Ppk/6Rb/7Q/8/8/8/8 w - - 0 1)

Matthaus, Hans Georg

Die Schwalbe, 1996

4K3/5Ppk/6Rb/7Q/8/8/8/8

#2

4 + 3

5454 Near Snap 2008
3713 Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rxg7+?
      • 1...Kh8
        • 2.Qxh6#
        • 2.f8Q#
      • 1...Kxg7!
  • Keys
    • 1.Qe5!
      • 1...Kxg6
        • 2.f8S#
      • 1...Kh8
        • 2.Rxh6#
      • 1...Bc1
        • 2.Qxg7#
      • 1...Bd2
        • 2.Qxg7#
      • 1...Be3
        • 2.Qxg7#
      • 1...Bf4
        • 2.Qxg7#
      • 1...Bg5
        • 2.Qxg7#

Anticipated by 255813(1936), 39186(1946)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK,XP(b)
      • Refutation
        • K(c);N_SPINB(a),P-FLIGHT,XR(B)
  • Actual
    • Q(A);N_PINB(a)
    • Vars
      • K(c);S_FLIGHT,XR(B)::P=S
      • K(c);P-FLIGHT,P_SPINP(b)::R(B),XB(a)
      • B(a);N_GUARD::QAR1(A),XP(b)
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