MESON Chess Problem Database

Problem Display
PID: 132648 (4K3/2p1p3/p2k4/R1nBn2R/8/N2P1Q2/8/8 w - - 0 1)

Koltanowski, George

Source?, 0000

4K3/2p1p3/p2k4/R1nBn2R/8/N2P1Q2/8/8

#2

7 + 6

2425 San Francisco Chronicle 0000

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd3
      • 2.Sc4#
    • 1...Sxf3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sg4
      • 2.Sc4#
    • 1...Sc6
      • 2.Sc4#
    • 1...Sg6
      • 2.Sc4#
    • 1...Sd7
      • 2.Sc4#
    • 1...Sf7
      • 2.Sc4#
  • Tries
    • 1.Rxa6+?
      • 1...Sc6
        • 2.Sc4#
        • 2.Sb5#
        • 2.Rxc6#
      • 1...c6
        • 2.Sb5#
      • 1...Sxa6!
    • 1.Rh6+?
      • 1...Se6
        • 2.Rxe6#
      • 1...Sg6
        • 2.Sc4#
      • 1...e6!
    • 1.Qg3?
      • threat
        • 2.Qxe5#
      • 1...Sxd3
        • 2.Sc4#
      • 1...Sd7
        • 2.Sc4#
      • 1...Kxd5!
    • 1.Qf4?
      • threat
        • 2.Qxe5#
      • 1...Sxd3
        • 2.Sc4#
      • 1...Sd7
        • 2.Sc4#
      • 1...Kxd5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qxe5#
      • 1...Kxd5
        • 2.Qd7#
      • 1...Scxd3
        • 2.Qe6#
      • 1...Sexd3
        • 2.Sc4#
      • 1...Scd7
        • 2.Qe6#
      • 1...Sf3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sc6
        • 2.Sc4#
      • 1...Sg6
        • 2.Sc4#
      • 1...Sed7
        • 2.Sc4#
      • 1...Sf7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,XP(B)::S(A)
    • S(b);N_GUARD,XQ(C)::S(A)
    • S(b);N_GUARD::S(A),XS(b)
    • S(b);N_GUARD::S(A)
  • Tries
    • Try
      • R(D);CHECK,XP(c)
      • Vars
        • P(e);P_SPINP(e)::S(A)
      • Refutation
        • S(a);XR(D)
    • Try
      • R(F);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R1(F),XS(a)
        • S(b);P_SPINS(b)::S(A)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(C);P_PINS(b)
      • Threat
        • QAB1(C),XS(b)
      • Vars
        • S(a);XP(B)::S(A)
        • S(a);::S(A)
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT,P_SPINS(a),XB(E)
    • Try
      • Q(C);P_PINS(b)
      • Threat
        • QAB1(C),XS(b)
      • Vars
        • S(a);XP(B)::S(A)
        • S(a);::S(A)
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT,P_SPINS(a),XB(E)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XS(b)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(a),XB(E)::QAR2(C)
      • S(a);N_GUARD,XP(B)::QAR1(C)
      • S(b);N_GUARD,XP(B)::S(A)
      • S(a);N_GUARD::QAR1(C)
      • S(b);N_GUARD::S(A)
      • S(b);N_GUARD::S(A),XS(b)
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