MESON Chess Problem Database

Problem Display
PID: 27770 (4R3/8/5pp1/4brp1/6p1/1N2k1N1/1Q3r2/KB4B1 w - - 0 1)

Dombrovskis, Alfreds A

Correspondence Chess, 1962

4R3/8/5pp1/4brp1/6p1/1N2k1N1/1Q3r2/KB4B1

#2

7 + 8

5454 Near Snap 2013
3713 Snap 2016
5454 Near Snap 2017

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.Ka2!
      • 1...Kf3
        • 2.Qxf2#
      • 1...Kf4
        • 2.Qxf2#
      • 1...Rf3
        • 2.Qd2#
      • 1...Rf4
        • 2.Qe2#

Anticipated by 158921(1924), 178(1950), 108430(1952-1953)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAB1(D)
    • R(e);SBLOCK::QAR2(D)
  • Tries
    • Try
      • S(E);N_SPINQ(D)
      • Vars
        • K(b);N_SPINB(d),N_SPINR(a),S_FLIGHT::QAR2(D),XR(a)
      • Refutation
        • R(e);
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(b);N_SPINB(d),N_SPINR(a),P-FLIGHT::QAR1(D),XR(a)
      • K(b);N_SPINB(d),N_SPINR(a),S_FLIGHT::QAR2(D),XR(a)
      • R(e);SBLOCK::QAB1(D)
      • R(e);SBLOCK::QAR1(D)
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