MESON Chess Problem Database

Problem Display
PID: 203332 (K4R1r/p1N3R1/3kP3/1Bn1p3/8/8/5Q2/7n w - - 0 1)

Simay-Molnar, Aladar

2nd Prize, Good Companions, 1924

K4R1r/p1N3R1/3kP3/1Bn1p3/8/8/5Q2/7n

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf8+
      • 2.Qxf8#
    • 1...Sb3
      • 2.Rd7#
    • 1...Sd3
      • 2.Rd7#
    • 1...Sa4
      • 2.Rd7#
    • 1...Se4
      • 2.Rd7#
    • 1...Sa6
      • 2.Rd7#
    • 1...Sxe6
      • 2.Rd7#
    • 1...Sb7
      • 2.Rd7#
    • 1...Sd7
      • 2.Rxd7#
    • 1...e4
      • 2.Qd4#
      • 2.Qf4#
  • Tries
    • 1.Se8+?
      • 1...Kxe6
        • 2.Bc4#
        • 2.Qf7#
      • 1...Kd5!
    • 1.Rd8+?
      • 1...Sd7
        • 2.Rxd7#
      • 1...Rxd8+!
    • 1.Rxh8?
      • threat
        • 2.Qf8#
      • 1...Sxe6
        • 2.Rd7#
      • 1...Sd7
        • 2.Rxd7#
      • 1...e4
        • 2.Qd4#
        • 2.Qf4#
      • 1...Sxf2!
    • 1.Qf3?
      • threat
        • 2.Qd5#
        • 2.Qc6#
      • 1...Rxf8+
        • 2.Qxf8#
      • 1...Sd7
        • 2.Qc6#
      • 1...e4
        • 2.Qf4#
      • 1...Se4!
    • 1.Qf6?
      • threat
        • 2.Qe7#
      • 1...Rxf8+
        • 2.Qxf8#
      • 1...e4
        • 2.Qd4#
        • 2.Qf4#
      • 1...Sd7!
    • 1.Qf7?
      • threat
        • 2.Qe7#
      • 1...Rxf8+
        • 2.Qxf8#
      • 1...e4
        • 2.Qf4#
      • 1...Sd7!
  • Keys
    • 1.e7!
      • threat
        • 2.e8S#
      • 1...Rxf8+
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Kxc7
        • 2.Qxc5#
      • 1...e4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(f);CHECK,OGATE,XR(G)::QAB(A),XR(f)
    • S(b);N_GUARD::R1(E)
    • S(b);N_GUARD,XP(C)::R1(E)
    • S(b);N_GUARD::R1(E),XS(b)
  • Tries
    • Try
      • S(D);CHECK,N_SPINR(G)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(E),XS(b)
      • Refutation
        • R(f);CHECK,XR(G)
    • Try
      • R(G);N_SPINR(G),XR(f)
      • Threat
        • QAB(A)
      • Vars
        • S(b);N_GUARD,XP(C)::R1(E)
        • S(b);N_GUARD::R1(E),XS(b)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,OGATE,XR(G)::QAB(A),XR(f)
        • S(b);::QAR1(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(f);CHECK,OGATE,XR(G)::QAB(A),XR(f)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(f);CHECK,OGATE,XR(G)::QAB(A),XR(f)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • S(b);
  • Actual
    • P(C);
    • Threat
      • P=S
    • Vars
      • R(f);CHECK,OGATE,XR(G)::PXR(f)=Q
      • K(d);S_FLIGHT,XS(D)::QAR2(A),XS(b)
      • P(c);OGATEB::QAB(A)
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