MESON Chess Problem Database

Problem Display
PID: 201754 (4N3/2pn4/1n3p2/4pp2/1Np1kPp1/1p2p1P1/bB4P1/K4Q2 w - - 0 1)

Butler, GV

Western Daily Mercury, 1919

(First published on Fri Apr 11 1919)

4N3/2pn4/1n3p2/4pp2/1Np1kPp1/1p2p1P1/bB4P1/K4Q2

#2

8 + 12

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxb1#
    • 1...Sa4
      • 2.Qxc4#
    • 1...Sd5
      • 2.Qxc4#
    • 1...Sa8
      • 2.Qxc4#
    • 1...Sc8
      • 2.Qxc4#
    • 1...Sc5
      • 2.Sxf6#
    • 1...Sb8
      • 2.Sxf6#
    • 1...Sf8
      • 2.Sxf6#
    • 1...e2
      • 2.Qxe2#
    • 1...c3
      • 2.Qd3#
    • 1...exf4
      • 2.Qxf4#
    • 1...c5
      • 2.Sd6#
    • 1...c6
      • 2.Sd6#
  • Tries
    • 1.Bc3?
      • 1...exf4
        • 2.Qxf4#
      • 1...e2
        • 2.Qxe2#
      • 1...Sc5
        • 2.Sxf6#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Sa4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qxc4#
      • 1...Sa8
        • 2.Qxc4#
      • 1...Sc8
        • 2.Qxc4#
      • 1...Sb8
        • 2.Sxf6#
      • 1...Sf8
        • 2.Sxf6#
      • 1...c5
        • 2.Sd6#
      • 1...c6
        • 2.Sd6#
      • 1...b2+!
    • 1.fxe5?
      • threat
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#
      • 1...Sd5
        • 2.Qxc4#
      • 1...fxe5!
  • Keys
    • 1.Qd1!
      • 1...exf4
        • 2.Qd4#
      • 1...e2
        • 2.Qxe2#
      • 1...Sc5
        • 2.Sxf6#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Sa4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa8
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#
      • 1...Sb8
        • 2.Sxf6#
      • 1...Sf8
        • 2.Sxf6#
      • 1...c3
        • 2.Qd3#
      • 1...c5
        • 2.Sd6#
      • 1...c6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(B),XB(a)
    • S(i);N_GUARD::QAR2(B),XP(d)
    • S(l);N_GUARD::S(H),XP(j)
    • P(c);OGATEB::QAR2(B),XP(c)
    • P(d);N_GUARD::QAB1(B)
    • P(g);OGATE,XP(G)::QAR1(B),XP(g)
    • P(k);N_GUARD::S(H)
  • Tries
    • Try
      • B(C);
      • Vars
        • P(g);OGATE,XP(G)::QAR1(B),XP(g)
        • P(c);OGATEB::QAR2(B),XP(c)
        • S(l);N_GUARD::S(H),XP(j)
        • B(a);N_GUARD::QAB(B),XB(a)
        • S(i);N_GUARD::QAR2(B),XP(d)
        • P(k);N_GUARD::S(H)
      • Refutation
        • P(b);CHECK
    • Try
      • P(G);XP(g)
      • Threat
        • QAR1(B)
      • Vars
        • P(h);::QAR1(B),XP(h)
        • S(i);N_GUARD::QAR2(B),XP(d)
      • Refutation
        • P(j);XP(G)
  • Actual
    • Q(B);
    • Vars
      • P(g);N_GUARD,XP(G)::QAR1(B)
      • P(c);OGATEB::QAR2(B),XP(c)
      • S(l);N_GUARD::S(H),XP(j)
      • B(a);N_GUARD::QAB(B),XB(a)
      • S(i);N_GUARD::QAB1(B)
      • S(i);N_GUARD::QAB1(B),XS(i)
      • P(d);N_GUARD::QAB1(B)
      • P(k);N_GUARD::S(H)
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