MESON Chess Problem Database

Problem Display
PID: 120796 (2q1r2n/2R5/2RN1p2/1p2kp2/b1P4Q/4N3/2PB3K/b6B w - - 0 1)

Willis, WF

Leeds Mercury Weekly Supplement, 1883

(First published on Sat Dec 30 1882)

2q1r2n/2R5/2RN1p2/1p2kp2/b1P4Q/4N3/2PB3K/b6B

#2

10 + 9

6490 yacpdb 2009
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sf7#
    • 1...Sg6
      • 2.Sf7#
    • 1...Sf7
      • 2.Sxf7#
    • 1...bxc4
      • 2.Sdxc4#
  • Tries
    • 1.Sdxf5?
      • threat
        • 2.Qg3#
        • 2.Qe4#
      • 1...Bxc2
        • 2.Qg3#
      • 1...Rg8
        • 2.Qe4#
      • 1...Sg6
        • 2.Qe4#
      • 1...Qxf5!
    • 1.Bc3+?
      • 1...Ke6
        • 2.Se4#
        • 2.Sxb5#
        • 2.Sdxf5#
        • 2.Sb7#
        • 2.Sf7#
        • 2.Sxc8#
        • 2.Sxe8#
        • 2.Bd5#
        • 2.Qxf6#
      • 1...Bxc3!
    • 1.Qf4+?
      • 1...Ke6
        • 2.Se4#
        • 2.Sxb5#
        • 2.Sdxf5#
        • 2.Sb7#
        • 2.Sf7#
        • 2.Sxc8#
        • 2.Sxe8#
        • 2.Bd5#
        • 2.Qxf5#
      • 1...Kxf4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sexf5#
      • 1...Kd4
        • 2.Qxa1#
      • 1...Kf4
        • 2.Qg3#
      • 1...Ke6
        • 2.Sf7#
      • 1...Bxc2
        • 2.Sxc2#
      • 1...Bd4
        • 2.Sg4#
      • 1...f4
        • 2.Sef5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • K(d);P-FLIGHT::R(H)+S(I)
    • S(i);N_GUARD::S(I)
    • S(i);N_GUARD::S(I),XS(i)
    • P(c);XP(F)::S(I),XP(c)
  • Tries
    • Try
      • S(I);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XP(B)::QAB(G)
        • R(h);::QAR1(G)
        • S(i);::QAR1(G)
      • Refutation
        • Q(g);XS(I)
    • Try
      • B(C);CHECK
      • Refutation
        • B(a);XB(C)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(d);S_FLIGHT,XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+S(E),XP(e)
    • Vars
      • K(d);S_FLIGHT::QAB(G),XB(a)
      • K(d);S_FLIGHT::QAB1(G)
      • K(d);P-FLIGHT::R(H)+S(I)
      • B(b);XP(B)::QAR(G)+S(E),XB(b)
      • B(a);SBLOCK::QAR(G)+S(E),DCHECK
      • P(e);::QAR(G)+S(E)
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