MESON Chess Problem Database

Problem Display
PID: 23248 (n4b2/5B2/1p3Rp1/4k3/R3NpK1/6n1/3P2pQ/8 w - - 0 1)

Slesarenko, Anatoly Vasilevich

The Problemist, 1996

n4b2/5B2/1p3Rp1/4k3/R3NpK1/6n1/3P2pQ/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qxf4#
    • 1...Sh1
      • 2.Qxf4#
    • 1...Sxe4
      • 2.Qxf4#
    • 1...Sf5
      • 2.Qxf4#
    • 1...f3
      • 2.Qxg3#
  • Tries
    • 1.Rf5+?
      • 1...Sxf5
        • 2.Qxf4#
      • 1...gxf5+!
    • 1.Rd6?
      • threat
        • 2.Rd5#
      • 1...Bxd6
        • 2.Qh8#
      • 1...Sxe4
        • 2.Qxf4#
      • 1...Sc7!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Rf5#
      • 1...Sxe4
        • 2.d4#
      • 1...Bb4
        • 2.Rxf4#
      • 1...Bg7
        • 2.Qe8#
      • 1...Sf5
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(b);OGATE,P_SPINP(c)::QAB1(B),XP(c)
    • S(b);OGATE,P_SPINP(c),XS(D)::QAB1(B),XP(c)
    • P(c);OGATEB,P_SPINS(b)::QAB(B),XS(b)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(b);OGATE,P_SPINP(c),XR(F)::QAB1(B),XP(c)
      • Refutation
        • P(f);CHECK,XR(F)
    • Try
      • R(F);
      • Threat
        • R1(F)
      • Vars
        • B(h);N_GUARD,XR(F)::QAB(B)
        • S(b);OGATE,P_SPINP(c),XS(D)::QAB1(B),XP(c)
      • Refutation
        • S(g);
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(F),DCHECK
    • Vars
      • S(b);SBLOCK,XS(D)::P(A)
      • B(h);N_GUARD::QAB(B)+R(F),XP(c)
      • B(h);OGATE::QAR(B)
      • S(b);::QAB(B)+R(F),DCHECK,XS(b)
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