MESON Chess Problem Database

Problem Display
PID: 232361 (8/rp6/k7/8/8/1R1K3Q/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1975

8/rp6/k7/8/8/1R1K3Q/8/8

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe6+?
      • 1...b6
        • 2.Qxb6#
      • 1...Ka5!
    • 1.Qc8?
      • 1...Ra8
        • 2.Qxa8#
      • 1...Ka5!
    • 1.Qe3?
      • threat
        • 2.Qb6#
      • 1...Ka5
        • 2.Qxa7#
      • 1...b6
        • 2.Qxb6#
      • 1...b5!
    • 1.Qh6+?
      • 1...b6
        • 2.Qxb6#
      • 1...Ka5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qa4#
        • 2.Qb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ra8
        • 2.Qa4#
      • 1...b5
        • 2.Qxb5#
      • 1...b6
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);P_PINP(c)
      • Vars
        • R(b);OGATEB::QAR2(C),XR(b)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C),XR(b)
        • P(c);::QAR1(C),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • R(b);::QAR2(C)
      • P(c);::QAB1(C),XP(c)
      • P(c);SBLOCK::R(A)
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