MESON Chess Problem Database

Problem Display
PID: 17198 (3r4/B4Q2/1q2R1p1/1P1k4/PprN2Kn/3R1p2/B7/8 w - - 0 1)

Olasz, Imre

1st Prize, Karlstadter Ty., 1925

3r4/B4Q2/1q2R1p1/1P1k4/PprN2Kn/3R1p2/B7/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rc6#
    • 1...Qxd4+
      • 2.Rxd4#
    • 1...Qa5
      • 2.Qb7#
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Qb7
      • 2.Qxb7#
  • Tries
    • 1.Bxc4+?
      • 1...Kc5
        • 2.Rc6#
        • 2.Qc7#
      • 1...Kxc4!
    • 1.Re5+?
      • 1...Kd6
        • 2.Rd5#
        • 2.Qe7#
      • 1...Kxe5!
    • 1.Rxb6+?
      • 1...Kc5
        • 2.Ra6#
        • 2.Rc6#
        • 2.Rf6#
        • 2.Rxg6#
        • 2.Qxc4#
      • 1...Ke5
        • 2.Qe6#
      • 1...Ke4!
    • 1.Rc6+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Ke4!
    • 1.Qxf3+?
      • 1...Kc5
        • 2.Bxb6#
        • 2.Rc6#
        • 2.Qc6#
      • 1...Sxf3!
    • 1.Qb7+?
      • 1...Kc5
        • 2.Bxb6#
        • 2.Qc6#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qxb7!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe5#
      • 1...Qxe6+
        • 2.Sf5#
      • 1...Kc5
        • 2.Sb3#
      • 1...Qxd4
        • 2.Qe4#
      • 1...Qc7
        • 2.Qe4#
      • 1...Qd6
        • 2.Qe4#
      • 1...Qb8
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(e);N_SPINR(c),P-FLIGHT,P_SPINQ(f)::R1(G)
    • Q(f);CHECK,OGATE,P_SPINQ(f),XS(D)::R1(B),XQ(f)
    • Q(f);N_GUARD::QAB(I)
    • Q(f);CHECK,OGATE,P_SPINQ(f),XR(G)::QAB1(I),XQ(f)
    • Q(f);N_GUARD::QAB(I),XQ(f)
  • Tries
    • Try
      • B(A);CHECK,N_SPINS(D),XR(c)
      • Refutation
        • K(e);S_FLIGHT,XB(A)
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT,XR(G)
    • Try
      • R(G);CHECK,XQ(f)
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT::QAR1(I)
      • Refutation
        • K(e);N_PINS(D),N_SPINR(c),S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT::QAR1(I)
      • Refutation
        • K(e);N_PINS(D),N_SPINR(c),S_FLIGHT
    • Try
      • Q(I);CHECK,XP(a)
      • Refutation
        • S(d);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAB1(I),XQ(f)
      • Refutation
        • Q(f);XQ(I)
  • Actual
    • Q(I);N_SPINS(D)
    • Threat
      • QAR1(I)
    • Vars
      • Q(f);CHECK,N_GUARD,SBLOCK,XR(G)::R(B)+S(D)
      • K(e);N_SPINR(c),P-FLIGHT,P_SPINQ(f)::S(D)
      • Q(f);P_PINQ(I),P_SPINQ(f),XS(D)::QAB1(I)
      • Q(f);::QAB1(I)
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