MESON Chess Problem Database

Problem Display
PID: 198155 (rb2RnQ1/1k6/p4p2/P2K4/8/2R1B3/8/8 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Good Companions, 1920

rb2RnQ1/1k6/p4p2/P2K4/8/2R1B3/8/8

#2

6 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Re7+?
      • 1...Sd7
        • 2.Qc8#
      • 1...Bc7!
    • 1.Qf7+?
      • 1...Bc7
        • 2.Rb3#
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Sd7!
    • 1.Qg7+?
      • 1...Bc7
        • 2.Rb3#
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Sd7!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qb2#
      • 1...Ra7
        • 2.Kd4#
      • 1...Bd6
        • 2.Kxd6#
      • 1...Ba7
        • 2.Kd6#
      • 1...Bc7
        • 2.Kc4#
      • 1...Sd7
        • 2.Ke6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(f);OGATE,P_SPINS(f)::QAB1(F)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(F);CHECK
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(F);CHECK
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • R(d);SBLOCK::QAB(F)+K(D)
      • B(e);::QAB(F)+K(D),XB(e)
      • B(e);::QAB(F)+K(D)
      • B(e);SBLOCK::QAB(F)+K(D)
      • S(f);::QAB(F)+K(D)
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