MESON Chess Problem Database

Problem Display
PID: 165444 (3RnQ2/1p2p3/r3P3/R1NNkp2/2P3Pn/1p2B1br/1K2Pp1p/1B5b w - - 0 1)

Shire, David J

The Problemist Supplement, 2017

3RnQ2/1p2p3/r3P3/R1NNkp2/2P3Pn/1p2B1br/1K2Pp1p/1B5b

#2

12 + 13

133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Rxd5#
    • 1...Sg2
      • 2.Qxf5#
    • 1...Sf3
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qxf5#
    • 1...Sd6
      • 2.Qg7#
      • 2.Qh8#
    • 1...Sc7
      • 2.Qg7#
      • 2.Qh8#
    • 1...Sg7
      • 2.Qxg7#
  • Tries
    • 1.Kc3?
      • threat
        • 2.Bd4#
      • 1...Bxd5
        • 2.Rxd5#
      • 1...Sf3
        • 2.Qxf5#
      • 1...Bf4!
    • 1.Sd3+?
      • 1...Kxe6
        • 2.Qxe7#
        • 2.Qg8#
      • 1...Ke4!
    • 1.Sd7+?
      • 1...Kxe6
        • 2.Qxe7#
      • 1...Kd6!
    • 1.Bxf5?
      • threat
        • 2.Sd3#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Be4!
    • 1.Qxe7?
      • threat
        • 2.Sd7#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Rd6!
    • 1.Qh8+?
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sf6!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sfd3#
      • 1...Bxf4
        • 2.Bd4#
      • 1...Rd6
        • 2.Sd7#
      • 1...Be4
        • 2.Scd3#

This is a version of 56120

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATE,XS(I)::R1(K),XB(a)
    • S(g);N_GUARD::QAR1(L),XP(i)
    • S(m);N_GUARD::QAB(L),XS(m)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • B(D)
      • Vars
        • B(a);OGATE,XS(I)::R1(K),XB(a)
        • S(g);N_GUARD::QAR1(L),XP(i)
      • Refutation
        • B(e);P_PINB(D)
    • Try
      • S(H);CHECK
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P-FLIGHT,XP(J)::QAR1(L),XP(l)
      • Refutation
        • K(h);P_SPINP(l),S_FLIGHT
    • Try
      • B(A);XP(i)
      • Threat
        • S(H)
      • Vars
        • S(g);OGATE,XB(A)::QAR1(L),XS(g)
      • Refutation
        • B(a);
    • Try
      • Q(L);XP(l)
      • Threat
        • S(H)
      • Vars
        • S(m);N_GUARD::QAB1(L),XS(m)
      • Refutation
        • R(j);
    • Try
      • Q(L);CHECK
      • Vars
        • S(m);N_GUARD,P_SPINS(m)::QAB(L),XS(m)
      • Refutation
        • S(m);P_SPINS(m)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • B(e);SBLOCK,XS(I)::B(D)
      • R(j);SBLOCK::R(G)+S(H),DCHECK
      • B(a);SBLOCK::R(G)+S(H),DCHECK
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