MESON Chess Problem Database

Problem Display
PID: 269859 (R7/8/q3Npr1/2R5/B3k1b1/2PN2rQ/4P1p1/2B2nKn w - - 0 1)

Gavrilovski, Zoran

64 Shakhmatnoe obozrenie, 2023

R7/8/q3Npr1/2R5/B3k1b1/2PN2rQ/4P1p1/2B2nKn

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Rxa4#
    • 1...Qa5
      • 2.Bc6#
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qa7
      • 2.Bc6#
    • 1...Bxe2
      • 2.Qf5#
    • 1...Bf3
      • 2.Qf5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bh5
      • 2.Qf5#
    • 1...Sf2
      • 2.Sxf2#
    • 1...f5
      • 2.Re5#
  • Tries
    • 1.Sg5+?
      • 1...fxg5
        • 2.Re5#
      • 1...Rxg5!
  • Keys
    • 1.Re8!
      • threat
        • 2.Sg5#
      • 1...Qxe6
        • 2.Bc6#
      • 1...Bxe2
        • 2.Qf5#
      • 1...Bxe6
        • 2.Qf5#
      • 1...Rg5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(g);OGATE,XB(G)::R(J),XQ(g)
    • Q(g);N_GUARD::B(G)
    • Q(g);N_GUARD::B(G),XQ(g)
    • Q(g);N_GUARD,P_PINR(H)::B(G)
    • B(f);OGATE,XP(C)::QAB1(F)
    • B(f);OGATE::QAB1(F)
    • B(f);OGATE::QAB1(F),XB(f)
    • S(b);N_GUARD::S(E),XS(b)
    • P(h);N_GUARD::R1(H)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • P(h);XS(I)::R1(H)
      • Refutation
        • R(i);XS(I)
  • Actual
    • R(J);
    • Threat
      • R(J)+S(I),DCHECK
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XS(I)::B(G)
      • B(f);OGATE,XP(C)::QAB1(F)
      • B(f);OGATE,P_SPINB(f),XS(I)::QAB1(F)
      • R(i);::R(J)+S(I),DCHECK,XR(i)
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