MESON Chess Problem Database

Problem Display
PID: 103299 (7b/B7/K7/R5p1/1pk5/3p3R/1pp1N3/4Q3 w - - 0 1)

Marandiuk, Mikhail Nazarovich

Mat, 1979

7b/B7/K7/R5p1/1pk5/3p3R/1pp1N3/4Q3

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...dxe2
      • 2.Qxe2#
    • 1...d2
      • 2.Rc5#
    • 1...b3
      • 2.Rc5#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qf7#
      • 1...Kb3
        • 2.Qf7#
      • 1...b3
        • 2.Qc5#
      • 1...Bf6!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qd5#
      • 1...Kb3
        • 2.Qd5#
      • 1...b3
        • 2.Ra4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(c);OGATE,XS(B)::QAB(A),XP(c)
    • P(c);::R1(D)
    • P(d);SBLOCK::R1(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • K(e);P_SPINP(c),S_FLIGHT::QAB(A)
        • P(d);SBLOCK::QAR1(A)
      • Refutation
        • B(g);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);P_SPINP(c),S_FLIGHT::QAB(A)
      • P(d);OGATEB,SBLOCK::R(D)
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