MESON Chess Problem Database

Problem Display
PID: 9483 (bB1R3b/3B4/2P2p2/3k4/1P2N2K/1P2pN2/4nn1p/7q w - - 0 1)

Blake, Percy Francis

1st Prize, Hampstead and Highgate Express, 1904

bB1R3b/3B4/2P2p2/3k4/1P2N2K/1P2pN2/4nn1p/7q

#2

9 + 9

15 British Chess Magazine 1905
3360 Simple Two-move Themes 1924
371 The Chess Review 1936
3713 Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sc3#
    • 1...Sg1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sg3
      • 2.Sc3#
    • 1...Sd4
      • 2.Sc3#
    • 1...Sf4
      • 2.Sc3#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Be8#
      • 1...Bxc6
        • 2.Be6#
      • 1...Se4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Bf5#
      • 1...Qxe4+
        • 2.Bg4#
      • 1...Kxd4
        • 2.Bf5#
      • 1...Kxe4
        • 2.Bf5#
      • 1...Bxc6
        • 2.Bxc6#
      • 1...Sxd4
        • 2.Sc3#
      • 1...Sxe4
        • 2.Be6#
      • 1...f5
        • 2.Bxf5#

This anticipates 89394(1918)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::S(D)
    • S(b);N_GUARD::S(D),XS(b)
  • Tries
    • Try
      • S(D);
      • Threat
        • R(I)+B(G)
      • Vars
        • B(h);SBLOCK,XP(F)::R(I)+B(G),DCHECK
      • Refutation
        • S(c);
  • Actual
    • S(B);
    • Threat
      • R(I)+B(G)
    • Vars
      • Q(a);CHECK,SBLOCK,XS(D)::R(I)+B(G)
      • K(f);P-FLIGHT,XS(B)::R(I)+B(G)
      • K(f);S_FLIGHT,XS(D)::B(G)
      • B(h);OGATE,XP(F)::R(I)+B(G),DCHECK,XB(h)
      • S(b);N_GUARD,SBLOCK,XS(B)::S(D)
      • S(c);SBLOCK,XS(D)::R(I)+B(G),DCHECK
      • P(g);::R(I)+B(G),XP(g)
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