MESON Chess Problem Database

Problem Display
PID: 149505 (b7/8/3R4/n2p2Q1/Bpkp1N2/1Np5/2p3K1/8 w - - 0 1)

Heyl, Peter

Troll, 2012

b7/8/3R4/n2p2Q1/Bpkp1N2/1Np5/2p3K1/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxd5#
    • 1...Sb7
      • 2.Qxd5#
  • Tries
    • 1.Rc6+?
      • 1...Sxc6
        • 2.Qxd5#
      • 1...Bxc6!
    • 1.Qe5?
      • threat
        • 2.Qxd4#
      • 1...Sc6
        • 2.Qxd5#
      • 1...d3
        • 2.Qd4#
      • 1...Sxb3!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Sxa5#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Sxb3
        • 2.Bb5#
      • 1...Sc6
        • 2.Rc5#
      • 1...Sb7
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);S_CUTB(h)::QAB1(E),XP(g)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(f);XR(F)::QAB1(E),XP(g)
      • Refutation
        • B(h);XR(F)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(e)
      • Vars
        • S(f);S_CUTB(h)::QAB1(E),XP(g)
        • P(e);::QAR1(E)
      • Refutation
        • S(f);XS(B)
  • Actual
    • R(F);P_SPINR(F),XP(g)
    • Threat
      • S(B),XS(f)
    • Vars
      • B(h);CHECK,OGATE,XR(F)::QAB1(E),XB(h)
      • S(f);SBLOCK,XS(B)::B(C)
      • S(f);N_PINR(F)::R1(F)
      • S(f);N_PINR(F)::R1(F),XP(e)
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