MESON Chess Problem Database

Problem Display
PID: 144140 (b1B3Q1/7p/1n2N3/2p1Nknr/p1p1Rp2/2P3p1/K5P1/8 w - - 0 1)

Keidanski, Theodore Hermann

Lasker's Chess Magazine, 1906

b1B3Q1/7p/1n2N3/2p1Nknr/p1p1Rp2/2P3p1/K5P1/8

#2

8 + 11

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...h6
      • 2.Qg6#
  • Tries
    • 1.Sd4+?
      • 1...Kf6
        • 2.Sg4#
      • 1...Kxe4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Rxf4#
      • 1...Kxe4
        • 2.Sxc5#
      • 1...Kxg4
        • 2.Rxf4#
      • 1...Bxe4
        • 2.Sd4#
      • 1...Sxe4
        • 2.Sd4#
      • 1...Sxe6
        • 2.Re5#
      • 1...Sh3
        • 2.Re5#
      • 1...Sd5
        • 2.Sxg5#
      • 1...f3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • P(j);N_GUARD::QAB1(H)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT::S(E)
      • Refutation
        • K(f);S_FLIGHT,XR(D)
  • Actual
    • S(E);
    • Threat
      • R1(D),XP(d)
    • Vars
      • K(f);S_FLIGHT,XR(D)::S(F),XP(e)
      • K(f);P_SPINP(d),P_SPINS(g),S_FLIGHT,XS(E)::R1(D),XP(d)
      • B(k);SBLOCK,XR(D)::B(G)+S(F),DCHECK
      • S(g);SBLOCK,XR(D)::B(G)+S(F),DCHECK
      • S(g);P_SPINS(g),XS(F)::R1(D)
      • S(g);::R1(D)
      • S(i);N_GUARD::B(G)+S(F),XS(g)
      • P(d);::R1(D)
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