MESON Chess Problem Database

Problem Display
PID: 174689 (nB3R1n/2b2N2/6p1/8/5k1N/7P/7K/4R3 w - - 0 1)

Saraswati, S

Busmen's Chess Review, 1957

nB3R1n/2b2N2/6p1/8/5k1N/7P/7K/4R3

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Bxe5#
    • 1...Bd6
      • 2.Bxd6#
    • 1...Sb6
      • 2.Bxc7#
    • 1...g5
      • 2.Sxh8#
  • Tries
    • 1.Sg2+?
      • 1...Kf3+
        • 2.Se5#
      • 1...Kf5+!
    • 1.Sg5+?
      • 1...Sf7
        • 2.Se6#
      • 1...Kxg5+!
    • 1.Sd8+?
      • 1...Sf7
        • 2.Se6#
      • 1...Kg5+!
    • 1.Rd8?
      • threat
        • 2.Rd4#
      • 1...Bd6
        • 2.Bxd6#
      • 1...Sxf7!
    • 1.Rfe8?
      • threat
        • 2.Rf1#
        • 2.R1e4#
        • 2.R8e4#
      • 1...Be5
        • 2.Bxe5#
      • 1...Sxf7!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sxh8#
      • 1...Kxf3+
        • 2.Se5#
      • 1...Kf5+
        • 2.Sd6#
      • 1...Sxf7
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(c);OGATE::B(F),XB(c)
    • S(d);N_GUARD::B(F),XB(c)
    • P(b);SBLOCK::R(G)+S(E),XS(e)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);CHECK,N_SPINB(c),P-FLIGHT::R(G)+S(E),DCHECK
      • Refutation
        • K(a);CHECK,N_SPINB(c),P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • S(e);P_SPINS(e)::S(E)
      • Refutation
        • K(a);CHECK,N_SPINB(c),S_FLIGHT,XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • S(e);P_SPINS(e)::S(E)
      • Refutation
        • K(a);CHECK,N_SPINB(c),S_FLIGHT
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • B(c);OGATE::B(F),XB(c)
      • Refutation
        • S(e);XS(E)
    • Try
      • R(G);
      • Threat
        • DUALS(3)
      • Vars
        • B(c);OGATE::B(F),XB(c)
      • Refutation
        • S(e);XS(E)
  • Actual
    • S(D);
    • Threat
      • R(G)+S(E),XS(e)
    • Vars
      • K(a);CHECK,N_SPINB(c),P-FLIGHT,XS(D)::R(G)+S(E),DCHECK
      • K(a);CHECK,N_SPINB(c),P-FLIGHT::R(G)+S(E),DCHECK
      • S(e);OGATE,P_SPINS(e),XS(E)::R(G),XS(e)
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