MESON Chess Problem Database

Problem Display
PID: 85777 (8/4k3/1KB3Q1/1pp5/8/8/3R4/5q2 w - - 0 1)

Speckmann, Werner

Schweizerische Arbeiter Schachzeitung, 1956

8/4k3/1KB3Q1/1pp5/8/8/3R4/5q2

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Qe8#
    • 1...Qf7
      • 2.Qd6#
    • 1...Qf8
      • 2.Rd7#
  • Tries
    • 1.Re2+?
      • 1...Kd8
        • 2.Re8#
        • 2.Qe8#
      • 1...Kf8
        • 2.Re8#
      • 1...Qxe2!
    • 1.Qg7+?
      • 1...Ke6
        • 2.Bd7#
      • 1...Qf7!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Re8#
      • 1...Kxd8
        • 2.Qe8#
      • 1...Qf6
        • 2.Qe8#
      • 1...Qf7
        • 2.Qd6#
      • 1...Qf8
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);P_PINB(C),SBLOCK::QAR1(D)
    • Q(a);SBLOCK::QAB1(D)
    • Q(a);SBLOCK::R1(A)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::R1(A)
      • Refutation
        • Q(a);XR(A)
    • Try
      • Q(D);CHECK
      • Vars
        • K(d);P-FLIGHT::B(C)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • K(d);S_FLIGHT,XR(A)::QAR1(D)
      • Q(a);P_PINB(C),SBLOCK::QAR1(D)
      • Q(a);SBLOCK::QAB1(D)
      • Q(a);SBLOCK::R1(A)
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