MESON Chess Problem Database

Problem Display
PID: 268277 (nK5b/2p5/2P5/2P2Qn1/Rp1k1P2/B2P4/N7/1r1N4 w - - 0 1)

van Baardwijk, N

Probleemblad, 1986

nK5b/2p5/2P5/2P2Qn1/Rp1k1P2/B2P4/N7/1r1N4

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bb2#
      • 2.Rxb4#
    • 1...Rb2
      • 2.Bxb2#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Qd7#
      • 1...Rxb4+
        • 2.Rxb4#
      • 1...Rxd1
        • 2.Bd2#
      • 1...Se4
        • 2.Qxe4#
      • 1...Se6
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Sb6
        • 2.Bc3#
      • 1...Be5!
  • Keys
    • 1.Sxb4!
      • threat
        • 2.Qd5#
      • 1...Rxb4+
        • 2.Rxb4#
      • 1...Rxd1
        • 2.Sd5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sb6
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::B(C),XR(a)
  • Tries
    • Try
      • B(C);P_SPINB(C),XP(b)
      • Threat
        • QAR(H)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XB(C)::R(E),XR(a)
        • R(a);N_PINB(C),XS(A)::R(E)+B(C)
        • S(d);N_GUARD::QAR1(H),XS(d)
        • S(d);N_GUARD::QAR1(H)
        • S(f);N_PINB(C)::R(E)+B(C),DCHECK
      • Refutation
        • B(g);
  • Actual
    • S(B);P_SPINS(B),XP(b)
    • Threat
      • QAR1(H)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(B)::R(E),XR(a)
      • R(a);N_PINS(B),XS(A)::R(E)+S(B)
      • B(g);N_GUARD::QAB1(H),XB(g)
      • S(f);N_PINS(B)::R(E)+S(B),DCHECK
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