MESON Chess Problem Database

Problem Display
PID: 187737 (5Q2/5N2/6n1/2K1Rb1r/8/5k2/7p/2B2B1N w - - 0 1)

Elkhan, Alexander A

Chess Weekly, 1909

5Q2/5N2/6n1/2K1Rb1r/8/5k2/7p/2B2B1N

#2

7 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Sg5#
      • 2.Qa8#
  • Tries
    • 1.Qa8+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Kg4!
  • Keys
    • 1.Re4!
      • 1...Bh3+
        • 2.Sg5#
      • 1...Bxe4+
        • 2.Se5#
      • 1...Bg4+
        • 2.Sg5#
      • 1...Be6+
        • 2.Sg5#
      • 1...Bd7+
        • 2.Sg5#
      • 1...Bc8+
        • 2.Sg5#
      • 1...Kxe4
        • 2.Qa8#
      • 1...Sxf8
        • 2.Rf4#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Rh3
        • 2.Sg5#
      • 1...Rh4
        • 2.Sg5#
      • 1...Rg5
        • 2.Sxg5#
      • 1...Rh6
        • 2.Sg5#
      • 1...Rh7
        • 2.Sg5#
      • 1...Rh8
        • 2.Sg5#
      • 1...Sh4
        • 2.Rf4#
      • 1...Se5
        • 2.Rf4#
      • 1...Se7
        • 2.Rf4#
      • 1...Sh8
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 19
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(c);N_GUARD,P_PINR(E),P_SPINB(c)::QAB1(G),XB(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(E);
    • Vars
      • B(c);CHECK::QAR(G)+S(F),DCHECK
      • B(c);CHECK,SBLOCK,XR(E)::QAR(G)+S(F),DCHECK
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB(G)
      • S(e);N_GUARD,XQ(G)::R1(E)
      • S(e);N_GUARD::R1(E),XS(e)
      • R(d);N_GUARD::S(F)
      • R(d);N_GUARD::S(F),XR(d)
      • S(e);N_GUARD::R1(E)
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