MESON Chess Problem Database

Problem Display
PID: 160905 (1b4Q1/p2p4/6pr/r4P2/1RN2Pk1/8/4RKP1/3B4 w - - 0 1)

Ersek, Tibor

Leiss, Hans-Dieter

Die Schwalbe, 1972

1b4Q1/p2p4/6pr/r4P2/1RN2Pk1/8/4RKP1/3B4

#2

9 + 7

6490 yacpdb 2017

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qxg5#
  • Tries
    • 1.Re1+?
      • 1...Kh4
        • 2.Rh1#
      • 1...Kxf5
        • 2.Qf7#
        • 2.Qf8#
      • 1...Kxf4!
    • 1.Re3+?
      • 1...Kh4
        • 2.Rh3#
      • 1...Kxf5
        • 2.Qf7#
        • 2.Qf8#
      • 1...Kxf4!
    • 1.Qxg6+?
      • 1...Kxf4
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sxa5#
        • 2.Se5#
        • 2.Sb6#
        • 2.Sd6#
        • 2.g3#
      • 1...Kh4
        • 2.Qg5#
      • 1...Rxg6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qg5#
      • 1...Kxf4
        • 2.Sd6#
      • 1...Kxf5
        • 2.Qg5#
      • 1...Kh5
        • 2.Re1#
        • 2.Ra2#
        • 2.Reb2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re3#
        • 2.Re4#
        • 2.Re5#
        • 2.Re6#
        • 2.Re8#
        • 2.Qg5#
      • 1...Rxf5
        • 2.Re4#
      • 1...Bxf4
        • 2.Re5#
      • 1...g5
        • 2.Qxg5#
      • 1...Rh5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAR1(I),XP(c)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::R(B)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT,XP(G)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::R1(B)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT,XP(G)
    • Try
      • Q(I);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT::QAB1(I)
      • Refutation
        • R(d);XQ(I)
  • Actual
    • Q(I);N_PINP(c)
    • Threat
      • QAR1(I)
    • Vars
      • K(a);P-FLIGHT,XP(G)::R(E)+S(F)
      • K(a);S_FLIGHT,XP(H)::QAR1(I)
      • R(b);P_PINP(G),SBLOCK,XP(H)::B(A)+R(B)
      • B(g);SBLOCK,XP(G)::B(A)+R(B)
      • P(c);::QAR1(I),XP(c)
      • R(d);SBLOCK::S(F)
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