MESON Chess Problem Database

Problem Display
PID: 261393 (1b2r2q/3R1R2/nn2k1pp/4p2P/p3N3/8/8/4Q2K w - - 0 1)

Machler, Emil

Neue Zurcher Zeitung, 1996

1b2r2q/3R1R2/nn2k1pp/4p2P/p3N3/8/8/4Q2K

#2

6 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sc7
      • 2.Sc5#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qg4#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Qf6
        • 2.Rxf6#
      • 1...Re7
        • 2.Rdxe7#
      • 1...Bd6
        • 2.Qxd6#
      • 1...gxh5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qh3#
      • 1...Sxd7
        • 2.Qc4#
      • 1...Re7
        • 2.Rfxe7#
      • 1...Bd6
        • 2.Rxd6#
      • 1...Qf6
        • 2.Qxf6#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::S(C)
    • S(c);N_GUARD::S(C),XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(d);OGATE,XR(E)::QAB1(A),XS(d)
        • Q(j);N_GUARD::R1(F),XQ(j)
        • R(i);N_GUARD::R1(E),XR(i)
        • B(h);N_GUARD::QAR1(A),XB(h)
      • Refutation
        • P(f);XP(D)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(d);N_GUARD,XR(E)::QAB(A)
      • R(i);N_GUARD::R1(F),XR(i)
      • B(h);N_GUARD::R1(E),XB(h)
      • Q(j);N_GUARD::QAR1(A),XQ(j)
      • P(f);N_GUARD::QAB1(A)
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