MESON Chess Problem Database

Problem Display
PID: 244779 (4R3/8/5p2/4brp1/6p1/1N2k1N1/PQ3r2/KB4B1 w - - 0 1)

Dombrovskis, Alfreds A

Correspondence Chess, 1962

4R3/8/5p2/4brp1/6p1/1N2k1N1/PQ3r2/KB4B1

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qd4#
    • 1...Rf4
      • 2.Qc3#
  • Tries
    • 1.Sd4?
      • 1...Kf4
        • 2.Qxf2#
      • 1...Rf4
        • 2.Sf1#
        • 2.Qc3#
      • 1...Rf3!
  • Keys
    • 1.Qc3+!
      • 1...Kf4
        • 2.Sh5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(e);SBLOCK::QAB1(E)
    • R(e);SBLOCK::QAR2(E)
  • Tries
    • Try
      • S(F);N_SPINQ(E)
      • Vars
        • K(b);N_SPINB(d),N_SPINR(a),S_FLIGHT::QAR2(E),XR(a)
      • Refutation
        • R(e);
  • Actual
    • Q(E);CHECK
    • Vars
      • K(b);N_SPINB(d),N_SPINR(a),S_FLIGHT::S(G)
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