MESON Chess Problem Database

Problem Display
PID: 166358 (1bQ5/8/1P1p1pp1/KB1pp3/RNNkr3/1p2R1P1/1Pb2p2/n1Bn3q w - - 0 1)

Guida, Marco

1st Place, League of Macedonian Problemists, 2013

1bQ5/8/1P1p1pp1/KB1pp3/RNNkr3/1p2R1P1/1Pb2p2/n1Bn3q

#2

11 + 14

145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Rxd3#
    • 1...Sxb2
      • 2.Bxb2#
    • 1...Sc3
      • 2.bxc3#
    • 1...dxc4
      • 2.Qxc4#
  • Tries
    • 1.Sxc2+?
      • 1...bxc2
        • 2.Sa3#
        • 2.Sxd6#
      • 1...Sxc2!
    • 1.Sd2?
      • threat
        • 2.Sxc2#
      • 1...Kxe3
        • 2.Sxd5#
      • 1...Bb1
        • 2.Sc2#
      • 1...Bd3
        • 2.Sc2#
        • 2.Rxd3#
      • 1...Bc7!
    • 1.Sa3?
      • threat
        • 2.Sa2#
        • 2.Sbxc2#
        • 2.Sd3#
        • 2.Sa6#
      • 1...Sxb2
        • 2.Sbxc2#
        • 2.Qc3#
      • 1...Sxe3
        • 2.Sbxc2#
        • 2.Qc3#
      • 1...Bc7
        • 2.Sd3#
        • 2.Sa6#
      • 1...f1Q
        • 2.Sbxc2#
        • 2.Sd3#
      • 1...f1B
        • 2.Sbxc2#
        • 2.Sd3#
      • 1...Qf1
        • 2.Sbxc2#
        • 2.Sd3#
      • 1...Bb1
        • 2.Sa2#
        • 2.Sbc2#
        • 2.Sd3#
        • 2.Sa6#
      • 1...Bd3
        • 2.Sbc2#
        • 2.Sxd3#
        • 2.Rxd3#
      • 1...Sc3
        • 2.Sbxc2#
        • 2.Qxc3#
        • 2.bxc3#
      • 1...Qe1!
    • 1.Sxd6?
      • threat
        • 2.Sa2#
        • 2.Sxc2#
        • 2.Sd3#
        • 2.Sa6#
      • 1...Bxd6
        • 2.Sxc2#
      • 1...Sxb2
        • 2.Sxc2#
        • 2.Qc3#
      • 1...Sxe3
        • 2.Sxc2#
        • 2.Qc3#
      • 1...Bc7
        • 2.Sd3#
        • 2.Sa6#
      • 1...f1Q
        • 2.Sxc2#
        • 2.Sd3#
      • 1...f1B
        • 2.Sxc2#
        • 2.Sd3#
      • 1...Qf1
        • 2.Sxc2#
        • 2.Sd3#
      • 1...Bb1
        • 2.Sa2#
        • 2.Sc2#
        • 2.Sd3#
        • 2.Sa6#
      • 1...Bd3
        • 2.Sc2#
        • 2.Sxd3#
        • 2.Rxd3#
      • 1...Sc3
        • 2.Sxc2#
        • 2.Qxc3#
        • 2.bxc3#
      • 1...Qe1!
    • 1.Qc5+?
      • 1...dxc5
        • 2.Sc6#
      • 1...Kxc5!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sbd3#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Sxb2
        • 2.Qc3#
      • 1...Sxe3
        • 2.Qc3#
      • 1...Qe1
        • 2.Sf3#
      • 1...Bd3
        • 2.Sbxd3#
      • 1...Sc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD::R1(C),XB(d)
    • S(b);OGATE,XP(B)::B(A),XS(b)
    • S(b);OGATE::P(B),XS(b)
    • P(i);OGATE,XS(G)::QAR1(K),XP(i)
  • Tries
    • Try
      • S(F);CHECK,XB(d)
      • Refutation
        • S(a);XS(F)
    • Try
      • S(G);
      • Threat
        • R(E)+S(F),DCHECK,XB(d)
      • Vars
        • K(g);S_FLIGHT,XR(C)::S(F),XP(i)
        • B(d);::R(E)+S(F),DCHECK
      • Refutation
        • B(n);P_PINP(J)
    • Try
      • S(G);
      • Threat
        • DUALS(4)
      • Refutation
        • Q(c);P_PINS(F)
    • Try
      • S(G);XP(k)
      • Threat
        • DUALS(4)
      • Vars
        • B(n);XS(G)::R(E)+S(F),DCHECK,XB(d)
      • Refutation
        • Q(c);P_PINS(F)
    • Try
      • Q(K);CHECK
      • Vars
        • P(k);SBLOCK,XQ(K)::S(F)
      • Refutation
        • K(g);S_FLIGHT,XQ(K)
  • Actual
    • S(G);XP(j)
    • Threat
      • R(E)+S(F)
    • Vars
      • K(g);P_SPINR(h),S_FLIGHT,XS(G)::S(F)
      • S(b);N_GUARD,XP(B)::QAB1(K)
      • S(b);N_GUARD,XR(C)::QAB1(K)
      • Q(c);N_GUARD,P_PINS(F)::S(G)
      • B(d);::R(E)+S(F),XB(d)
      • S(b);N_GUARD::QAB1(K),XS(b)
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