MESON Chess Problem Database

Problem Display
PID: 232344 (1kN5/2p2P2/2Qp4/3K4/8/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1973

1kN5/2p2P2/2Qp4/3K4/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021
5454 Near Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc8
      • 2.f8Q#
      • 2.f8R#
  • Tries
    • 1.Kc4?
      • 1...Kxc8
        • 2.f8Q#
        • 2.f8R#
      • 1...d5+!
    • 1.Kd4?
      • 1...Kxc8
        • 2.f8Q#
        • 2.f8R#
      • 1...d5!
    • 1.Ke4?
      • 1...Kxc8
        • 2.f8Q#
        • 2.f8R#
      • 1...d5+!
    • 1.Ke6?
      • 1...Kxc8
        • 2.Qa8#
        • 2.f8Q#
        • 2.f8R#
      • 1...d5!
    • 1.Sxd6?
      • threat
        • 2.Qb7#
      • 1...Ka7
        • 2.Qb7#
      • 1...cxd6!
    • 1.Qb5+?
      • 1...Kxc8
        • 2.f8Q#
        • 2.f8R#
      • 1...Ka8!
    • 1.Qxc7+?
      • 1...Ka8
        • 2.Sb6#
        • 2.Qa7#
      • 1...Kxc7!
  • Keys
    • 1.f8S!
      • 1...Kxc8
        • 2.Qa8#

Anticipated by 21607(1920)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(b),XS(D)::P=Q
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(D)::P=Q
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(D)::P=Q
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(D)::P=Q
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);S_FLIGHT
      • Refutation
        • P(a);
    • Try
      • S(D);XP(a)
      • Threat
        • QAR1(B)
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
      • Refutation
        • P(b);XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(D)::P=Q
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK,XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
  • Actual
    • P(C);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b),XS(D)::QAR2(B)
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