MESON Chess Problem Database

Problem Display
PID: 87593 (8/3N1Np1/6p1/7B/3Qpkn1/8/5P2/5R1K w - - 0 1)

Krishnamurthy, Thiruvannam S

Narayanan, Chithathuz Gopatan Sathya

The Problemist, 1968

8/3N1Np1/6p1/7B/3Qpkn1/8/5P2/5R1K

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qe3#
    • 1...Sxf2+
      • 2.Qxf2#
    • 1...Sh2
      • 2.Qe5#
    • 1...Se3
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sf6
      • 2.Qe5#
    • 1...Sh6
      • 2.Qe5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qxe4#
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...Kf3
        • 2.Qe3#
        • 2.Qxe4#
      • 1...Sf6
        • 2.Qe5#
      • 1...Kf5!
    • 1.Qd6+?
      • 1...Kf5
        • 2.Bxg6#
      • 1...Se5
        • 2.Qxe5#
      • 1...Kf3!
  • Keys
    • 1.Re1!
      • threat
        • 2.Qxe4#
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...Kf3
        • 2.Qe3#
      • 1...Kf5
        • 2.Qxe4#
      • 1...Se3
        • 2.Qe5#
      • 1...Sf6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(b);N_SPINP(a),P-FLIGHT,P_SPINS(c)::QAR1(D)
    • S(c);CHECK,OGATE,P_SPINS(c),XP(C)::QAR2(D),XS(c)
    • S(c);N_GUARD::QAB1(D)
    • S(c);N_GUARD::QAB1(D),XS(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(D),XP(a)
      • Vars
        • S(c);CHECK,OGATE,P_SPINS(c),XP(C)::QAR2(D),XS(c)
        • S(c);N_GUARD::QAB1(D)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(D);CHECK,N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::B(E),XP(d)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(D),XS(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(c)
  • Actual
    • R(A);
    • Threat
      • QAR1(D),XP(a)
    • Vars
      • S(c);CHECK,OGATE,XP(C)::QAR2(D),XS(c)
      • K(b);N_SPINP(a),P-FLIGHT,P_SPINS(c)::QAR1(D)
      • K(b);N_SPINP(a),P-FLIGHT::QAB1(D),XP(a)
      • S(c);N_GUARD::QAB1(D)
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