MESON Chess Problem Database

Problem Display
PID: 197744 (4K3/2N2B2/2p1N3/4q3/2k1p3/BR2P3/2P5/8 w - - 0 1)

Lipton, Michael

British Chess Magazine, 2019

4K3/2N2B2/2p1N3/4q3/2k1p3/BR2P3/2P5/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sd4#
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sg7#
      • 2.Sd8#
      • 2.Sf8#
    • 1...Qb2
      • 2.Sd4#
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sg7#
      • 2.Sd8#
      • 2.Sf8#
    • 1...Qh2
      • 2.Sd4#
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sg7#
      • 2.Sd8#
      • 2.Sf8#
    • 1...Qc3
      • 2.Sd4#
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sg7#
      • 2.Sd8#
      • 2.Sf8#
    • 1...Qg3
      • 2.Sd4#
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sg7#
      • 2.Sd8#
      • 2.Sf8#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qf4
      • 2.Sxf4#
    • 1...Qxc7
      • 2.Sxc7#
    • 1...Qg7
      • 2.Sxg7#
    • 1...Qh8+
      • 2.Sf8#
    • 1...Qa5
      • 2.Sc5#
    • 1...Qb5
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qg5
      • 2.Sxg5#
    • 1...Qxe6+
      • 2.Bxe6#
  • Tries
    • 1.Rc3+?
      • 1...Qxc3
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sg7#
        • 2.Sd8#
        • 2.Sf8#
      • 1...Kxc3!
  • Keys
    • 1.Sa8!
      • threat
        • 2.Sb6#
      • 1...Qb8+
        • 2.Sd8#
      • 1...Qh8+
        • 2.Sf8#
      • 1...Qxe6+
        • 2.Bxe6#
      • 1...Kd5
        • 2.Sb6#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qc7
        • 2.Sexc7#
      • 1...Qa5
        • 2.Sc5#
      • 1...Qb5
        • 2.Sc5#
      • 1...Qc5
        • 2.Sxc5#

This is after

After Loshinsky/Baev, 1930.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_PINS(E)::B(G)+S(E),XQ(c)
    • Q(c);N_PINS(E),XS(F)::B(G)+S(E),XQ(c)
    • Q(c);CHECK,N_PINS(E)::B(G)+S(E)
    • Q(c);N_PINS(E)::B(G)+S(E)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::B(G),XQ(c)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(C)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(c);CHECK,N_PINS(E)::B(G)+S(E)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::B(G),XQ(c)
      • K(a);S_FLIGHT::S(F)
      • Q(c);N_PINS(E)::B(G)+S(E),XQ(c)
      • Q(c);N_PINS(E)::B(G)+S(E)
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