MESON Chess Problem Database

Problem Display
PID: 231245 (8/4ppp1/6n1/1KN1k1B1/8/6PB/1P6/3R4 w - - 0 1)

Schiffmann, Israel Abraham

Revista de Sah, 1927

8/4ppp1/6n1/1KN1k1B1/8/6PB/1P6/3R4

#2

7 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.gxf4#
  • Tries
    • 1.Kc4?
      • threat
        • 2.Rd5#
      • 1...Sf4
        • 2.gxf4#
      • 1...e6!
    • 1.Kc6?
      • threat
        • 2.Rd5#
      • 1...Sf4
        • 2.gxf4#
      • 1...e6!
    • 1.Be6?
      • threat
        • 2.Rd5#
      • 1...Sf4
        • 2.gxf4#
      • 1...fxe6!
    • 1.Bf4+?
      • 1...Kf6
        • 2.Se4#
        • 2.Sd7#
      • 1...Sxf4!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Bc3#
      • 1...Kd4
        • 2.Bf4#
      • 1...Kd5
        • 2.Bc3#
        • 2.Bf4#
      • 1...Kd6
        • 2.Bf4#
      • 1...Kf6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(b);OGATE::P(C),XS(b)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • R1(A)
      • Vars
        • S(b);OGATE::P(C),XS(b)
      • Refutation
        • P(c);
    • Try
      • K(E);S_FLIGHT
      • Threat
        • R1(A)
      • Vars
        • S(b);OGATE::P(C),XS(b)
      • Refutation
        • P(c);
    • Try
      • B(D);
      • Threat
        • R1(A)
      • Vars
        • S(b);OGATE::P(C),XS(b)
      • Refutation
        • P(d);XB(D)
    • Try
      • B(G);CHECK
      • Refutation
        • S(b);XB(G)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • K(a);S_FLIGHT::R(A)+B(G)
      • K(a);S_FLIGHT::R(A)+B(G),DCHECK
      • K(a);S_FLIGHT::S(F)
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