MESON Chess Problem Database

Problem Display
PID: 180437 (8/8/1N5p/7R/1k6/pB1p4/Pn1P4/1QK5 w - - 0 1)

Lider, Valentin Viktorovich

Skakbladet, 1988

8/8/1N5p/7R/1k6/pB1p4/Pn1P4/1QK5

#2

7 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Bxd1#
    • 1...Sa4
      • 2.Bxa4#
    • 1...Sc4
      • 2.Bxc4#
  • Tries
    • 1.Rd5?
      • 1...Sd1
        • 2.Bxd1#
      • 1...Sa4
        • 2.Bxa4#
      • 1...Sc4
        • 2.Bxc4#
      • 1...h5!
    • 1.Re5?
      • 1...Sd1
        • 2.Bxd1#
      • 1...Sa4
        • 2.Bxa4#
      • 1...Sc4
        • 2.Bxc4#
      • 1...h5!
    • 1.Rf5?
      • 1...Sd1
        • 2.Bxd1#
      • 1...Sa4
        • 2.Bxa4#
      • 1...Sc4
        • 2.Bxc4#
      • 1...h5!
    • 1.Qc2?
      • threat
        • 2.Qc3#
        • 2.Qc5#
      • 1...Sd1
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sc4
        • 2.Qc3#
        • 2.Qxc4#
      • 1...dxc2!
    • 1.Qxd3?
      • threat
        • 2.Rb5#
        • 2.Qb5#
        • 2.Qc3#
        • 2.Qd6#
      • 1...Sd1
        • 2.Rb5#
        • 2.Qc4#
        • 2.Qe4#
        • 2.Qb5#
        • 2.Qd4#
        • 2.Qd6#
      • 1...Sa4
        • 2.Rb5#
        • 2.Qc4#
        • 2.Qe4#
        • 2.Qb5#
        • 2.Qd4#
      • 1...Sc4
        • 2.Qxc4#
        • 2.Qc3#
      • 1...Sxd3+!
  • Keys
    • 1.Qa1!
      • 1...Sd1
        • 2.Qd4#
      • 1...Sa4
        • 2.Qd4#
      • 1...Sc4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATEB::QAR(A)+B(E),XS(a)
  • Tries
    • Try
      • R(F);
      • Vars
        • S(a);OGATEB::QAR(A)+B(E),XS(a)
      • Refutation
        • P(e);
    • Try
      • R(F);
      • Vars
        • S(a);OGATEB::QAR(A)+B(E),XS(a)
      • Refutation
        • P(e);
    • Try
      • R(F);
      • Vars
        • S(a);OGATEB::QAR(A)+B(E),XS(a)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);XP(c)
      • Threat
        • DUALS(4)
      • Refutation
        • S(a);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • S(a);OGATE::QAR2(A)
      • S(a);OGATE::QAB1(A)
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