MESON Chess Problem Database

Problem Display
PID: 204426 (4RQ2/8/7p/2P2q2/5k2/2b2P2/6K1/4B3 w - - 0 1)

Kofman, Rafael Moiseevich

Revista de Sah, 1925

4RQ2/8/7p/2P2q2/5k2/2b2P2/6K1/4B3

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Bd2#
    • 1...Bb2
      • 2.Bd2#
    • 1...Bd2
      • 2.Bxd2#
    • 1...Be5
      • 2.Bd2#
    • 1...Bf6
      • 2.Bd2#
    • 1...Bg7
      • 2.Bd2#
    • 1...Bh8
      • 2.Bd2#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Bg3#
        • 2.Re4#
      • 1...Bxe1
        • 2.Re4#
      • 1...Bxf6
        • 2.Bd2#
      • 1...Be5
        • 2.Bd2#
      • 1...Qxf6!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qxf5#
      • 1...Kxe5
        • 2.Qd6#
      • 1...Kg5
        • 2.Qxf5#
      • 1...Qxf8
        • 2.Bg3#
      • 1...Bxe5
        • 2.Bd2#
      • 1...Qf6
        • 2.Bg3#
        • 2.Qxf6#
      • 1...Qf7
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::B(A)
    • B(a);N_GUARD::B(A),XB(a)
    • B(a);N_GUARD,N_SPINQ(c)::B(A)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XB(A)::R1(E)
        • B(a);N_GUARD,N_SPINQ(c),XQ(F)::B(A)
        • B(a);N_GUARD::B(A)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
  • Actual
    • R(E);
    • Threat
      • QAR1(F),XQ(c)
    • Vars
      • K(b);N_SPINQ(c),OGATEB,S_FLIGHT,XR(E)::QAB1(F)
      • K(b);S_FLIGHT::QAR1(F),XQ(c)
      • Q(c);N_SPINQ(c),XQ(F)::B(A)
      • B(a);N_GUARD,SBLOCK,XR(E)::B(A)
      • Q(c);::B(A)
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