MESON Chess Problem Database

Problem Display
PID: 227315 (5K2/3b4/4Nk2/6R1/8/1Q6/1p2r3/8 w - - 0 1)

Speckmann, Werner

Probleemblad, 1981

5K2/3b4/4Nk2/6R1/8/1Q6/1p2r3/8

#2

4 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qe7#
      • 1...Kxe6
        • 2.Qe7#
      • 1...Rxe6!
    • 1.Qc3+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Kxe6!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe7#
      • 1...Kxe6
        • 2.Qe7#
      • 1...Rxe6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • R(b);XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XS(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);P-FLIGHT,XS(C)::QAR1(A)
      • R(b);SBLOCK,XS(C)::QAR2(A)
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