MESON Chess Problem Database

Problem Display
PID: 205851 (4bb1Q/5B2/q1pN1RP1/B3k1P1/p1n3P1/2R3p1/2Np4/Kn6 w - - 0 1)

Shanshin, Valery Yurevich

Troll, 2019

4bb1Q/5B2/q1pN1RP1/B3k1P1/p1n3P1/2R3p1/2Np4/Kn6

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Qxe8#
    • 1...Bg7
      • 2.Qxe8#
    • 1...Sxc3
      • 2.Bxc3#
    • 1...Sb2
      • 2.Re3#
      • 2.Rc5#
    • 1...Sa3
      • 2.Re3#
      • 2.Rc5#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sxa5
      • 2.Re3#
      • 2.Rc5#
    • 1...Sb6
      • 2.Re3#
    • 1...g2
      • 2.Qh2#
  • Tries
    • 1.Sxc4+?
      • 1...Ke4
        • 2.Re3#
      • 1...Qxc4!
    • 1.Bc7?
      • threat
        • 2.Rf5#
      • 1...Bxd6
        • 2.Qxe8#
      • 1...Sxd6
        • 2.Re3#
      • 1...Bxf7!
    • 1.Re6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qe4#
      • 1...Bxd6
        • 2.Rf5#
      • 1...Sxc3
        • 2.Bxc3#
      • 1...Sxd6
        • 2.Rc5#
      • 1...g2
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(j);OGATE::QAR(K),XB(i)
    • S(a);OGATE,XR(C)::B(E),XS(a)
    • S(e);N_GUARD::R(C),XS(e)
    • S(e);N_GUARD::R(C)
    • P(c);OGATEB::QAB(K)
  • Tries
    • Try
      • S(G);CHECK,XS(e)
      • Vars
        • K(f);P-FLIGHT::R1(C)
      • Refutation
        • Q(g);XS(G)
    • Try
      • B(E);
      • Threat
        • QAB(K)+R(H),DCHECK
      • Vars
        • B(j);OGATE,P_SPINB(j),XS(G)::QAR(K),XB(i)
        • S(e);N_GUARD,P_SPINS(e),XS(G)::R(C)
      • Refutation
        • B(i);XB(J)
    • Try
      • R(H);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT::QAR1(K)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(K);
    • Threat
      • QAR1(K)
    • Vars
      • B(j);SBLOCK,XS(G)::R1(H)
      • S(a);OGATE,XR(C)::B(E),XS(a)
      • S(e);OGATE,XS(G)::R(C)
      • P(c);OGATEB::QAB(K)
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Developed and maintained by Brian Stephenson.
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