MESON Chess Problem Database

Problem Display
PID: 9478 (B7/8/2P5/2qkp2K/N1N3Q1/3p1R2/3b4/2n5 w - - 0 1)

Kallaway, AF

1st Prize, Bolton Football and Field, 1904/I

B7/8/2P5/2qkp2K/N1N3Q1/3p1R2/3b4/2n5

#2

7 + 6

15 British Chess Magazine 1904
3360 Simple Two-move Themes 1924
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.c7#
    • 1...Qf2
      • 2.c7#
    • 1...Qa3
      • 2.c7#
    • 1...Qe3
      • 2.c7#
    • 1...Qd6
      • 2.Scb6#
    • 1...Qe7
      • 2.c7#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Be3
      • 2.Sc3#
    • 1...Bg5
      • 2.Sc3#
    • 1...Bh6
      • 2.Sc3#
  • Tries
    • 1.Scb6+?
      • 1...Kd6
        • 2.Qd7#
      • 1...Qxb6!
  • Keys
    • 1.Re3!
      • threat
        • 2.Rxe5#
      • 1...Qxe3
        • 2.c7#
      • 1...Qxc4
        • 2.Qd7#
      • 1...Bxe3
        • 2.Sc3#
      • 1...Qd4
        • 2.Qg8#
      • 1...e4
        • 2.Qxe4#
      • 1...Qd6
        • 2.Scb6#
      • 1...Qe7
        • 2.c7#
      • 1...Bc3
        • 2.Sxc3#

This anticipates 89393(1918), 99348(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(d);N_GUARD::B(G)+P(F)
    • Q(d);N_GUARD,SBLOCK::S(C)
    • B(b);N_GUARD::S(B),XB(b)
    • B(b);N_GUARD::S(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(D)
      • Refutation
        • Q(d);XS(C)
  • Actual
    • R(A);
    • Threat
      • R1(A),XP(f)
    • Vars
      • Q(d);N_GUARD,XR(A)::B(G)+P(F)
      • Q(d);N_GUARD,SBLOCK,XS(C)::QAR2(D)
      • B(b);N_GUARD,XR(A)::S(B)
      • Q(d);SBLOCK::QAB(D)
      • P(f);::QAB1(D),XP(f)
      • Q(d);N_GUARD,SBLOCK::S(C)
      • Q(d);N_GUARD::B(G)+P(F)
      • B(b);N_GUARD::S(B),XB(b)
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