MESON Chess Problem Database

Problem Display
PID: 268721 (n7/1q4NQ/b2p1R1b/3k4/Pp1P4/1P6/2N5/KB6 w - - 0 1)

Marchant, G

Sunday Referee, 1930

(First published on Sun Apr 6 1930)

n7/1q4NQ/b2p1R1b/3k4/Pp1P4/1P6/2N5/KB6

#2

9 + 7

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qf5#
    • 1...Bc1
      • 2.Qh1#
    • 1...Bd2
      • 2.Qh1#
    • 1...Be3
      • 2.Qh1#
    • 1...Bf4
      • 2.Qh1#
    • 1...Bg5
      • 2.Qh1#
    • 1...Bxg7
      • 2.Qh1#
  • Tries
    • 1.Sxb4+?
      • 1...Qxb4
        • 2.Qe4#
      • 1...Kxd4!
  • Keys
    • 1.Sf5!
      • 1...Ke4
        • 2.Se7#
      • 1...Kc6
        • 2.Rxd6#
      • 1...Qxh7
        • 2.Sxb4#
      • 1...Qc6
        • 2.Sxb4#
        • 2.Se7#
      • 1...Qc8
        • 2.Sxb4#
        • 2.Se7#
      • 1...Qb5
        • 2.Se7#
      • 1...Qb6
        • 2.Se7#
      • 1...Qa7
        • 2.Sxb4#
      • 1...Qc7
        • 2.Sxb4#
      • 1...Qd7
        • 2.Sxb4#
      • 1...Qe7
        • 2.Sxb4#
        • 2.Sxe7#
      • 1...Qf7
        • 2.Sxb4#
      • 1...Qg7
        • 2.Sxb4#
      • 1...Qb8
        • 2.Se7#
      • 1...Bf1
        • 2.Qxb7#
      • 1...Be2
        • 2.Qxb7#
      • 1...Bd3
        • 2.Qxb7#
      • 1...Bc4
        • 2.Qxb7#
      • 1...Bb5
        • 2.Sxb4#
      • 1...Bc1
        • 2.Qh1#
      • 1...Bd2
        • 2.Qh1#
      • 1...Be3
        • 2.Qh1#
      • 1...Bf4
        • 2.Qh1#
      • 1...Bg5
        • 2.Qh1#
      • 1...Bg7
        • 2.Qh1#
      • 1...Bf8
        • 2.Qh1#
      • 1...Sb6
        • 2.Sxb4#
      • 1...Sc7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 19
    • REMOVED MATES = 1
  • Sets
    • Q(f);SBLOCK::QAR2(I)
    • B(e);OGATE::QAB(I)
    • B(e);OGATE,XS(H)::QAB(I)
  • Tries
    • Try
      • S(C);CHECK,XP(a)
      • Vars
        • Q(f);XS(C)::QAB1(I)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
  • Actual
    • S(H);
    • Vars
      • K(b);S_CUTQ(f),S_FLIGHT::QAB(I)+S(H)
      • K(b);N_GUARD,P_SPINP(d),S_FLIGHT::R1(G),XP(d)
      • Q(f);N_GUARD,XQ(I)::S(C),XP(a)
      • Q(f);N_GUARD::S(H)
      • Q(f);N_GUARD::S(C),XP(a)
      • B(c);N_GUARD::QAB(I),XQ(f)
      • B(c);S_CUTQ(f)::S(C),XP(a)
      • B(e);OGATE::QAB(I)
      • S(g);S_CUTQ(f)::S(C),XP(a)
      • S(g);S_CUTQ(f)::S(H)
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