MESON Chess Problem Database

Problem Display
PID: 77771 (2N5/4p2p/b1B4Q/4kp2/1pr3pb/2pR1nr1/8/K1N2R2 w - - 0 1)

Klar, Eugene

2nd Prize=, ABP, 1946

2N5/4p2p/b1B4Q/4kp2/1pr3pb/2pR1nr1/8/K1N2R2

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rd5#
  • Tries
    • 1.Re1+?
      • 1...Re4
        • 2.Rd5#
      • 1...Sxe1!
    • 1.Re3+?
      • 1...Kd4
        • 2.Sb3#
      • 1...Re4!
    • 1.Qg7+?
      • 1...Kf4
        • 2.Se2#
      • 1...Ke6
        • 2.Bd7#
      • 1...Bf6!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxe6!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sd3#
      • 1...Rxc6
        • 2.Qe3#
      • 1...exd6
        • 2.Qxd6#
      • 1...f4
        • 2.Qe6#
      • 1...Rd4
        • 2.Re6#
      • 1...Re4
        • 2.Rd5#
      • 1...Rf4
        • 2.Qe6#
      • 1...Rc5
        • 2.Qe3#
      • 1...Se1
        • 2.Qe6#
      • 1...Sg1
        • 2.Qe6#
      • 1...Sd2
        • 2.Qe6#
      • 1...Sh2
        • 2.Qe6#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sg5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::R1(D)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • R(e);P_SPINR(e)::R1(D)
      • Refutation
        • S(b);XR(C)
    • Try
      • R(D);CHECK
      • Vars
        • K(h);S_FLIGHT::S(B)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);P_SPINS(b),S_FLIGHT::S(B)
        • K(h);P-FLIGHT::B(E)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);OGATE,P_SPINS(b),S_FLIGHT::QAB1(F)
      • Refutation
        • K(h);P-FLIGHT,XQ(F)
  • Actual
    • R(D);
    • Threat
      • S(B)
    • Vars
      • R(e);N_GUARD,XB(E)::QAR2(F)
      • P(k);OGATE,XR(D)::QAB1(F),XP(k)
      • P(i);SBLOCK::QAR1(F)
      • R(e);SBLOCK::R1(D)
      • R(e);SBLOCK::QAR1(F)
      • R(e);N_GUARD::QAR2(F)
      • S(b);::QAR1(F)
      • S(b);S_CUTR(e)::QAB1(F)
      • S(b);S_CUTB(g)::QAB(F)
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