MESON Chess Problem Database

Problem Display
PID: 23426 (1r6/7p/Q2R1N2/2k1p2K/8/2p3B1/8/8 w - - 0 1)

Pospisil, Josef

Brunner Beobachter, 1886

1r6/7p/Q2R1N2/2k1p2K/8/2p3B1/8/8

#2

5 + 5

15 British Chess Magazine 1908
3804 Ceske Melodie 1908
15 British Chess Magazine 1910
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sd7#
      • 2.Rd5#
      • 2.Qc6#
  • Tries
    • 1.Rc6+?
      • 1...Kd4
        • 2.Bf2#
      • 1...Kb4!
    • 1.Qa4?
      • threat
        • 2.Se4#
        • 2.Rc6#
      • 1...Rb4
        • 2.Qc6#
      • 1...Rb5
        • 2.Se4#
      • 1...Rb6
        • 2.Se4#
        • 2.Rd5#
      • 1...Rc8
        • 2.Se4#
      • 1...e4
        • 2.Sxe4#
        • 2.Sd7#
        • 2.Rc6#
      • 1...Kxd6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rc4#
      • 1...Kxd4
        • 2.Bf2#
      • 1...exd4
        • 2.Bd6#
      • 1...Rb6
        • 2.Qc4#
      • 1...Rb4
        • 2.Rd5#
      • 1...Rb5
        • 2.Qd6#

This anticipates 158655(1906-1907), 93234(1907), 107876(1963)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);SBLOCK::QAR1(C)
        • R(e);::S(E)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT,XR(D)
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::B(A)
      • P(c);OGATE,SBLOCK,XR(D)::B(A)
      • R(e);SBLOCK::QAR1(C)
      • R(e);SBLOCK::R1(D)
      • R(e);SBLOCK::QAB1(C)
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