MESON Chess Problem Database

Problem Display
PID: 241245 (rkB3nR/p4pK1/p2P4/pq1pNQ2/8/8/8/2R4b w - - 0 1)

Pilchenko, Viacheslav Karlovich

Sachsische Zeitung, 1988

rkB3nR/p4pK1/p2P4/pq1pNQ2/8/8/8/2R4b

#2

7 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sc6#
      • 2.Sd7#
    • 1...Qe2
      • 2.Sc6#
      • 2.Sd7#
    • 1...Qd3
      • 2.Sc6#
      • 2.Sd7#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qb1
      • 2.Sc6#
      • 2.Sd7#
      • 2.Rxb1#
      • 2.Qxb1#
    • 1...Qb3
      • 2.Sc6#
      • 2.Sd7#
    • 1...Qb4
      • 2.Sc6#
      • 2.Sd7#
    • 1...Qb6
      • 2.Sd7#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Sc6#
      • 1...Qb2
        • 2.Rxb2#
      • 1...Se7
        • 2.Sd7#
      • 1...d4!
    • 1.Qd7?
      • threat
        • 2.Qc7#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Qc4
        • 2.Qb7#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qc5
        • 2.Qb7#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Qb6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Sd7#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Sf6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::S(B),XQ(c)
    • Q(c);N_GUARD::S(B)
  • Tries
    • Try
      • R(A);P_PINQ(c)
      • Threat
        • S(B)
      • Vars
        • Q(c);OGATEB,P_PINS(B)::R(A),XQ(c)
        • S(j);::S(B)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • Q(c);XQ(C)::S(B),XQ(c)
        • Q(c);N_GUARD::QAR1(C)
        • Q(c);N_GUARD::S(B),XQ(c)
        • Q(c);N_GUARD::QAR1(C),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • Q(C);P_PINQ(c)
    • Threat
      • S(B)
    • Vars
      • Q(c);OGATEB,P_PINS(B)::QAR(C),XQ(c)
      • S(j);::S(B)
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