MESON Chess Problem Database

Problem Display
PID: 138494 (5B2/5K2/4P3/2NPpPN1/4B3/2P1kP1P/2RnPp1Q/5R2 w - - 0 1)

Chandrasekaran, KR

Ramanujan, TV

1st Prize, BCF 116. Ty., 1967-1968

5B2/5K2/4P3/2NPpPN1/4B3/2P1kP1P/2RnPp1Q/5R2

#2

15 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe2
      • 2.Qxf2#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qxf2#
      • 1...Kxe2
        • 2.Re1#
        • 2.Qxf2#
      • 1...Sxe4!
    • 1.Qg3?
      • 1...Kxe2
        • 2.Qxf2#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Sxe4
        • 2.fxe4#
      • 1...Sb1
        • 2.f4#
      • 1...Sb3
        • 2.f4#
      • 1...Sc4
        • 2.f4#
      • 1...Sxf1!
    • 1.Qxe5?
      • 1...Kxe2
        • 2.Bd3#
      • 1...Sxf1
        • 2.Bd3#
      • 1...Sxf3
        • 2.Bxf3#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Sb1
        • 2.Bd3#
      • 1...Sb3
        • 2.Bd3#
      • 1...Sc4!
  • Keys
    • 1.Bh6!
      • 1...Kxe2
        • 2.Qxf2#
      • 1...Sxf1
        • 2.Sh7#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...Sxe4
        • 2.Sgxe4#
      • 1...Sb1
        • 2.Sh7#
      • 1...Sb3
        • 2.Sh7#
      • 1...Sc4
        • 2.Sh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(b),P_SPINS(a),XP(C)::QAR1(D),XP(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAB1(D),XP(b)
      • Refutation
        • S(a);XB(H)
    • Try
      • Q(D);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(a),XP(C)::QAR1(D),XP(b)
        • S(a);OGATE,P_SPINS(a),XP(F)::QAR1(D),XS(a)
        • S(a);OGATE,XB(H)::QAR(D)+P(F),XS(a)
        • S(a);N_GUARD::QAR(D)+P(F)
      • Refutation
        • S(a);XR(A)
    • Try
      • Q(D);XP(d)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(a),XP(C)::QAR(D)+B(H),DCHECK
        • S(a);N_GUARD,XR(A)::QAR(D)+B(H)
        • S(a);OGATE,XP(F)::QAR(D)+B(H),XS(a)
        • S(a);OGATE,P_SPINS(a),XB(H)::QAR1(D),XS(a)
        • S(a);N_GUARD::QAR(D)+B(H)
      • Refutation
        • S(a);
  • Actual
    • B(O);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b),P_SPINS(a),XP(C)::QAR1(D),XP(b)
      • S(a);XR(A)::B(O)+S(L)
      • S(a);XP(F)::B(O)+S(L),XS(a)
      • S(a);XB(H)::B(O)+S(L),XS(a)
      • S(a);::B(O)+S(L)
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