MESON Chess Problem Database

Problem Display
PID: 210576 (1n2Rr2/2P2k2/4p2P/1Q5p/4K3/8/8/8 w - - 0 1)

Hoeg, Nils

Land og Folk, 1971

1n2Rr2/2P2k2/4p2P/1Q5p/4K3/8/8/8

#2

5 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qd7+?
      • 1...Kf6
        • 2.Qg7#
      • 1...Kg6
        • 2.Qg7#
      • 1...Kg8
        • 2.Qg7#
      • 1...Sxd7!
    • 1.Qf5+?
      • 1...Kxe8
        • 2.Qxe6#
      • 1...Kg8
        • 2.Rxf8#
      • 1...exf5+!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxe6#
      • 1...Kg6
        • 2.Qg7#
      • 1...Kxe8
        • 2.Qxe6#
      • 1...Kg8
        • 2.Qg7#
      • 1...Rxe8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(B)
        • K(c);OGATE,S_FLIGHT::QAR1(B)
        • K(c);OGATE,P_SPINR(e),S_FLIGHT::QAR1(B)
      • Refutation
        • S(d);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(E)::QAR2(B),XP(b)
        • K(c);P_SPINR(e),S_FLIGHT::R1(E),XR(e)
      • Refutation
        • P(b);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(b)
    • Vars
      • K(c);S_FLIGHT::QAR1(B)
      • K(c);P_SPINP(b),S_FLIGHT,XR(E)::QAR2(B),XP(b)
      • K(c);P_SPINR(e),S_FLIGHT::QAR1(B)
      • R(e);SBLOCK,XR(E)::QAR1(B)
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