MESON Chess Problem Database

Problem Display
PID: 213050 (1n2Q3/2k5/p2R4/2B5/2K5/8/8/8 w - - 0 1)

Kjaer, Harald

Land og Folk, 1968

1n2Q3/2k5/p2R4/2B5/2K5/8/8/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Rd7#
  • Tries
    • 1.Rd7+?
      • 1...Kc6
        • 2.Qe6#
        • 2.Qc8#
      • 1...Sxd7!
    • 1.Qe7+?
      • 1...Kc8
        • 2.Rd8#
      • 1...Sd7!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Qxb8#
      • 1...Kxd6
        • 2.Bxb8#
      • 1...Kb7
        • 2.Qxb8#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sc6
        • 2.Rd7#
        • 2.Qxc6#
        • 2.Qd7#

FEATURES

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