MESON Chess Problem Database

Problem Display
PID: 163467 (8/8/4Q2B/1Npr1p2/P3bp2/2Pk1p1R/n1RN4/3K4 w - - 0 1)

de Jongh, WJ

Probleemblad, 1978

8/8/4Q2B/1Npr1p2/P3bp2/2Pk1p1R/n1RN4/3K4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Rxf3#
    • 1...Sxc3+
      • 2.Rxc3#
  • Tries
    • 1.Qxd5+?
      • 1...Ke3
        • 2.Sf1#
        • 2.Sc4#
      • 1...Bxd5!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Se5#
      • 1...Ke3+
        • 2.Sfd4#
      • 1...Kc4+
        • 2.Sd2#
      • 1...Bxf3+
        • 2.Qe2#
      • 1...Sxc3+
        • 2.Rxc3#
      • 1...Re5
        • 2.Se1#
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_PINS(C),P_SPINB(d)::R1(E),XP(c)
    • S(a);CHECK,OGATE,XP(D)::R1(B),XS(a)
  • Tries
    • Try
      • Q(H);CHECK,XR(g)
      • Refutation
        • B(d);XQ(H)
  • Actual
    • S(C);XP(c)
    • Threat
      • R(E)+S(C),DCHECK
    • Vars
      • K(b);CHECK,P-FLIGHT,P_SPINB(d),P_SPINP(e)::R(E)+S(C)
      • K(b);CHECK,P_SPINR(g),S_FLIGHT::S(C)
      • B(d);CHECK,OGATE,P_SPINB(d),XS(C)::QAB1(H)
      • S(a);CHECK,OGATE,XP(D)::R1(B),XS(a)
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