MESON Chess Problem Database

Problem Display
PID: 222594 (1B6/3p3B/N1Nq2p1/Pp1k1nP1/1p1pR3/1r1P4/Q7/K7 w - - 0 1)

Sherrard, Hugh William

Prize, Sheffield Independent, 1884

1B6/3p3B/N1Nq2p1/Pp1k1nP1/1p1pR3/1r1P4/Q7/K7

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Scxb4#
    • 1...Qg3
      • 2.Scxb4#
    • 1...Qf4
      • 2.Scxb4#
    • 1...Qxc6
      • 2.Re5#
    • 1...Qe6
      • 2.Scxb4#
    • 1...Qf6
      • 2.Scxb4#
    • 1...dxc6
      • 2.Qxb3#
  • Tries
    • 1.Saxb4+?
      • 1...Kc5
        • 2.Ba7#
      • 1...Qxb4!
    • 1.Bg8+?
      • 1...Qe6
        • 2.Scxb4#
      • 1...Kxc6!
  • Keys
    • 1.Re6!
      • 1...Kxc6
        • 2.Qg2#
      • 1...Kxe6
        • 2.Bg8#
      • 1...Qxb8
        • 2.Qxb3#
      • 1...Qxc6
        • 2.Re5#
      • 1...Qxe6
        • 2.Scxb4#
      • 1...dxc6
        • 2.Qxb3#
      • 1...dxe6
        • 2.Qg2#
      • 1...Qh2
        • 2.Qxb3#
      • 1...Qg3
        • 2.Qxb3#
      • 1...Qf4
        • 2.Qxb3#
      • 1...Qc5
        • 2.Sc7#
      • 1...Qe5
        • 2.Qxb3#
      • 1...Qc7
        • 2.Qxb3#
      • 1...Qe7
        • 2.Qxb3#
      • 1...Qf8
        • 2.Qxb3#
      • 1...Se3
        • 2.Rxd6#
      • 1...Sg3
        • 2.Rxd6#
      • 1...Sh4
        • 2.Rxd6#
      • 1...Sh6
        • 2.Rxd6#
      • 1...Se7
        • 2.Rxd6#
      • 1...Sg7
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 15
    • REMOVED MATES = 1
  • Sets
    • Q(g);N_GUARD::S(H),XP(b)
    • Q(g);N_GUARD,SBLOCK,XS(H)::R1(D)
    • P(i);SBLOCK,XS(H)::QAB(B),XR(a)
  • Tries
    • Try
      • S(G);CHECK,XP(b)
      • Vars
        • K(e);N_SPINR(a),P-FLIGHT::B(J)
      • Refutation
        • Q(g);XS(G)
    • Try
      • B(I);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(H),XP(b)
      • Refutation
        • K(e);N_SPINR(a),S_FLIGHT,XS(H)
  • Actual
    • R(D);
    • Vars
      • K(e);N_SPINR(a),P_SPINQ(g),S_FLIGHT,XS(H)::QAB(B)
      • K(e);OGATEB,S_FLIGHT,XR(D)::B(I)
      • Q(g);XB(J)::QAB(B),XR(a)
      • Q(g);N_GUARD,SBLOCK,XS(H)::R1(D)
      • Q(g);N_GUARD,SBLOCK,XR(D)::S(H),XP(b)
      • P(i);SBLOCK,XS(H)::QAB(B),XR(a)
      • P(i);SBLOCK,XR(D)::QAB(B)
      • Q(g);::QAB(B),XR(a)
      • Q(g);N_GUARD,SBLOCK::S(G)
      • S(f);N_GUARD::R1(D),XQ(g)
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