MESON Chess Problem Database

Problem Display
PID: 196241 (1b6/P4pNb/npp2BpK/Rq1R3p/1N2Pk2/6pP/2rP2P1/3Q2n1 w - - 0 1)

Chobanyan, Shamil

Sachova skladba, 1986

1b6/P4pNb/npp2BpK/Rq1R3p/1N2Pk2/6pP/2rP2P1/3Q2n1

#2

12 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rd4#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sxh3
      • 2.Qf3#
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Sd3+?
      • 1...Kxe4
        • 2.Rd4#
      • 1...Qxd3!
    • 1.Qf1+?
      • 1...Kxe4
        • 2.Rd4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Qxf1!
  • Keys
    • 1.Rd4!
      • threat
        • 2.e5#
      • 1...Qg5+
        • 2.Bxg5#
      • 1...Qxb4
        • 2.Bg5#
      • 1...Rxd2
        • 2.Qxd2#
      • 1...Qe2
        • 2.Bg5#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Bg5#
      • 1...Qc4
        • 2.Bg5#
      • 1...Qc5
        • 2.Sd3#
      • 1...Qd5
        • 2.Sd3#
        • 2.exd5#
      • 1...Qe5
        • 2.Sd3#
      • 1...Qf5
        • 2.Sd3#
        • 2.exf5#
      • 1...Rc4
        • 2.Sd3#
      • 1...Be5
        • 2.Bg5#
      • 1...Se2
        • 2.Qf1#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sc5
        • 2.axb8Q#
        • 2.axb8B#
      • 1...c5
        • 2.Sd5#
      • 1...g5
        • 2.Sxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 3
  • Sets
    • K(d);OGATEB,P-FLIGHT,XP(F)::R1(H)
    • S(a);N_GUARD::QAR1(A),XS(a)
    • S(a);N_GUARD,XP(D)::QAR1(A)
    • P(f);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::R1(H)
      • Refutation
        • Q(e);XS(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::R1(H)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • R(H);
    • Threat
      • R(H)+P(F)
    • Vars
      • Q(e);CHECK,N_GUARD::B(I),XQ(e)
      • Q(e);N_GUARD,XS(E)::B(I)
      • R(b);OGATE,XP(B)::QAB(A),XR(b)
      • Q(e);N_GUARD::B(I)
      • Q(e);N_GUARD::S(E)
      • R(b);S_CUTQ(e)::S(E)
      • B(m);SBLOCK,S_CUTQ(e)::B(I)
      • S(a);N_GUARD,S_CUTQ(e)::QAR(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(g);N_GUARD,S_CUTQ(e)::PXB(m)=Q
      • P(i);N_GUARD,S_CUTQ(e)::S(E)
      • P(j);N_GUARD,S_CUTQ(e)::S(L),XP(f)
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