MESON Chess Problem Database

Problem Display
PID: 166348 (kbK5/2n1N2R/8/8/8/3Q4/8/8 w - - 0 1)

Olanik, A

Comm., Bron MT, 1993

kbK5/2n1N2R/8/8/8/3Q4/8/8

#2

4 + 3

145 StrateGems 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qb7#
        • 2.Qxb8#
      • 1...Ka7
        • 2.Qb7#
      • 1...Ba7
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sb5!
    • 1.Qe4+?
      • 1...Ka7
        • 2.Qb7#
      • 1...Sd5!
    • 1.Qb5?
      • threat
        • 2.Qb7#
        • 2.Qxb8#
      • 1...Ka7
        • 2.Qb7#
      • 1...Ba7
        • 2.Qc6#
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sxb5!
    • 1.Qa6+?
      • 1...Ba7
        • 2.Qb7#
        • 2.Qc6#
      • 1...Sxa6!
    • 1.Qb3?
      • threat
        • 2.Qb7#
        • 2.Qxb8#
      • 1...Ka7
        • 2.Qb7#
      • 1...Ba7
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sb5!
    • 1.Qf3+?
      • 1...Ka7
        • 2.Qb7#
      • 1...Sd5!
    • 1.Qd5+?
      • 1...Ka7
        • 2.Qb7#
      • 1...Sxd5!
    • 1.Qd7?
      • 1...Ba7
        • 2.Qc6#
      • 1...Sb5
        • 2.Qb7#
      • 1...Sd5
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Se8
        • 2.Qb7#
      • 1...Ka7!
  • Keys
    • 1.Sd5!
      • 1...Ka7
        • 2.Qa3#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Ba7
        • 2.Sxc7#
      • 1...Sb5
        • 2.Sb6#
      • 1...Sa6
        • 2.Sb6#
      • 1...Se6
        • 2.Sb6#
      • 1...Se8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • B(c);::QAB1(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • B(c);::QAB1(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Vars
        • B(c);SBLOCK::QAB(A)
        • S(a);OGATE::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(a)
  • Actual
    • S(B);
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a)::QAR(A)
      • S(a);OGATE,XS(B)::QAB(A),XS(a)
      • B(c);N_GUARD,SBLOCK::S(B),XS(a)
      • S(a);::S(B)
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