MESON Chess Problem Database

Problem Display
PID: 232369 (5B2/5Rrk/6N1/8/8/7K/8/6Q1 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1978

5B2/5Rrk/6N1/8/8/7K/8/6Q1

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kg8
      • 2.Rxg7#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Qxg7#
      • 1...Kh6
        • 2.Qg6#
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Rxf7!
    • 1.Sh4?
      • threat
        • 2.Qxg7#
      • 1...Kh6
        • 2.Qg6#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Rxf7!
    • 1.Se5?
      • threat
        • 2.Qxg7#
      • 1...Kh6
        • 2.Qg6#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Rxf7!
    • 1.Sh8?
      • threat
        • 2.Qxg7#
      • 1...Kh6
        • 2.Qg6#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Kxh8
        • 2.Qxg7#
      • 1...Rxf7!
    • 1.Qg5?
      • threat
        • 2.Rxg7#
      • 1...Kg8
        • 2.Rxg7#
      • 1...Rxf7!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qxg7#
      • 1...Kh6
        • 2.Qg6#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Rxf7
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINR(a),S_FLIGHT::R1(D),XR(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XR(a)
        • K(b);N_SPINR(a),P-FLIGHT::QAB1(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XR(D)
    • Try
      • S(C);
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAR1(A),XR(a)
        • K(b);N_SPINR(a),P-FLIGHT::QAB1(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XR(D)
    • Try
      • S(C);
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAR1(A),XR(a)
        • K(b);N_SPINR(a),P-FLIGHT::QAB1(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XR(D)
    • Try
      • S(C);
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAR1(A),XR(a)
        • K(b);N_SPINR(a),P-FLIGHT,XS(C)::QAB1(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XR(D)
    • Try
      • Q(A);
      • Threat
        • R1(D),XR(a)
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::R1(D),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XR(D)
  • Actual
    • S(C);
    • Threat
      • QAR1(A),XR(a)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);N_SPINR(a),P-FLIGHT::QAB1(A),XR(a)
      • R(a);N_SPINR(a),OGATE,XR(D)::QAB1(A)
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