MESON Chess Problem Database

Problem Display
PID: 129826 (8/5P2/8/2Q5/k7/5r2/2n2p2/3B1K2 w - - 0 1)

Berkovec, Jan

Tyden rozhlasu, 1944

8/5P2/8/2Q5/k7/5r2/2n2p2/3B1K2

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Bxc2#
    • 1...Rf5
      • 2.Bxc2#
    • 1...Rf6
      • 2.Bxc2#
    • 1...Rxf7
      • 2.Bxc2#
  • Tries
    • 1.f8B?
      • threat
        • 2.Qb4#
      • 1...Kb3
        • 2.Qxc2#
      • 1...Rxf8
        • 2.Bxc2#
      • 1...Rf4
        • 2.Bxc2#
      • 1...Rb3!
  • Keys
    • 1.f8Q!
      • threat
        • 2.Qb4#
      • 1...Kb3
        • 2.Qxc2#
      • 1...Rxf8
        • 2.Bxc2#
      • 1...Rb3
        • 2.Qa8#
      • 1...Rf4
        • 2.Bxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::B(A),XS(a)
    • R(c);N_GUARD,XP(D)::B(A),XS(a)
  • Tries
    • Try
      • P(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(d);S_FLIGHT::QAB1(C),XS(a)
        • R(c);N_GUARD,XB(D)::B(A),XS(a)
        • R(c);N_GUARD::B(A),XS(a)
      • Refutation
        • R(c);N_SPINS(a)
  • Actual
    • P(D);
    • Threat
      • QAR1(C)
    • Vars
      • K(d);S_FLIGHT::QAB1(C),XS(a)
      • R(c);N_GUARD,XQ(D)::B(A),XS(a)
      • R(c);N_SPINS(a),SBLOCK::QAR(D)
      • R(c);N_GUARD::B(A),XS(a)
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