MESON Chess Problem Database

Problem Display
PID: 255355 (3q4/5n2/3PNp2/3kpP2/BR2N3/K1B2n2/P1P1R3/5r2 w - - 0 1)

Shire, David J

Problemist Ukraini, 2021

3q4/5n2/3PNp2/3kpP2/BR2N3/K1B2n2/P1P1R3/5r2

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Sxc7#
    • 1...Qxd6
      • 2.Sxf6#
    • 1...Qa8
      • 2.Sc7#
    • 1...Qe8
      • 2.Sc7#
    • 1...Qf8
      • 2.Sc7#
    • 1...Qg8
      • 2.Sc7#
    • 1...Qh8
      • 2.Sc7#
    • 1...Sg1
      • 2.Rd2#
    • 1...Sd2
      • 2.Rxd2#
    • 1...Sh2
      • 2.Rd2#
    • 1...Sh4
      • 2.Rd2#
    • 1...S3g5
      • 2.Rd2#
  • Tries
    • 1.Be1?
      • threat
        • 2.c4#
      • 1...Sxd6
        • 2.Sc3#
      • 1...Qc7
        • 2.Sxc7#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Qc8!
    • 1.Rb5+?
      • 1...Kc4
        • 2.Rc5#
      • 1...Kc6!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Sc3#
      • 1...Kxe5
        • 2.Rb5#
      • 1...S3xe5
        • 2.Rd4#
      • 1...S7xe5
        • 2.Sf4#
      • 1...fxe5
        • 2.c4#
      • 1...Qc8
        • 2.Sxf6#
      • 1...Qc7
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(g);N_GUARD::S(K),XQ(g)
    • Q(g);N_GUARD,P_PINR(G),SBLOCK,XP(J)::S(H),XP(e)
    • Q(g);N_GUARD,P_PINB(F)::S(K)
    • Q(g);N_GUARD::S(K)
    • S(b);N_GUARD::R(C)
    • S(b);N_GUARD::R(C),XS(b)
  • Tries
    • Try
      • B(E);
      • Threat
        • P(B)
      • Vars
        • S(f);SBLOCK,XP(J)::S(H)
        • Q(g);N_GUARD::S(K),XQ(g)
        • S(b);N_GUARD::R(C),XS(b)
      • Refutation
        • Q(g);
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(G)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • B(E);XP(d)
    • Threat
      • S(H)
    • Vars
      • K(c);N_GUARD,P-FLIGHT,XB(E)::R(G)
      • S(b);N_GUARD,SBLOCK,XB(E)::R1(G)
      • S(f);SBLOCK,XB(E)::S(K)
      • P(e);SBLOCK,XB(E)::P(B)
      • Q(g);N_GUARD::S(H),XP(e)
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