MESON Chess Problem Database

Problem Display
PID: 93825 (8/1K6/3k2n1/2NnR3/1p6/4N1Q1/8/8 w - - 0 1)

Lissner, Morris

Ceske listy sachove, 1897

8/1K6/3k2n1/2NnR3/1p6/4N1Q1/8/8

#2

5 + 4

6490 yacpdb 2009
14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Rxd5#
    • 1...Sc3
      • 2.Sc4#
      • 2.Sf5#
    • 1...Sdf4
      • 2.Sc4#
    • 1...Sb6
      • 2.Sf5#
    • 1...Sf6
      • 2.Sc4#
      • 2.Sf5#
    • 1...Sc7
      • 2.Sc4#
      • 2.Sf5#
    • 1...Sde7
      • 2.Sc4#
      • 2.Rd5#
    • 1...Sge7
      • 2.Rxd5#
  • Tries
    • 1.Qxg6+?
      • 1...Kxc5
        • 2.Rxd5#
        • 2.Qb6#
      • 1...Sf6
        • 2.Sc4#
        • 2.Qxf6#
      • 1...Kxe5!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Sc4#
      • 1...Kxc5
        • 2.Rxd5#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Sxe3
        • 2.Qf6#
      • 1...Sxe5
        • 2.Sf5#
      • 1...Sb6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);P_SPINS(b),S_FLIGHT,XS(C)::R1(D),XS(b)
    • S(b);::S(A)
    • S(d);SBLOCK::QAB(B)+R(D),DCHECK,XS(b)
  • Tries
    • Try
      • Q(B);CHECK,XS(d)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
  • Actual
    • Q(B);
    • Threat
      • S(A)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT,XS(C)::R1(D),XS(b)
      • K(c);S_FLIGHT,XR(D)::S(A)
      • S(b);N_GUARD,XS(A)::QAR2(B)
      • S(d);SBLOCK,XR(D)::S(A)
      • S(b);N_GUARD::QAR2(B)
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