MESON Chess Problem Database

Problem Display
PID: 79330 (8/5b2/8/8/Np6/k7/8/K2Q4 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakhmaty v SSSR, 1977

8/5b2/8/8/Np6/k7/8/K2Q4

#2

3 + 3

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb2?
      • threat
        • 2.Qa4#
      • 1...b3
        • 2.Qd6#
      • 1...Be8
        • 2.Sc4#
      • 1...Bb3!
    • 1.Sc3?
      • threat
        • 2.Sb1#
        • 2.Sb5#
        • 2.Qa4#
      • 1...b3
        • 2.Qd6#
      • 1...Ba2
        • 2.Sb5#
        • 2.Qa4#
      • 1...Bb3
        • 2.Qc1#
      • 1...Bc4
        • 2.Sb1#
        • 2.Qa4#
      • 1...Bg6
        • 2.Sb5#
        • 2.Qa4#
      • 1...Be8
        • 2.Sb1#
      • 1...bxc3!
    • 1.Sc5?
      • threat
        • 2.Qa4#
        • 2.Qc1#
      • 1...Bb3
        • 2.Qxb3#
        • 2.Qc1#
      • 1...Be8
        • 2.Qb3#
        • 2.Qc1#
      • 1...b3!
    • 1.Qc1+?
      • 1...Kb3
        • 2.Sc5#
      • 1...Kxa4!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qa4#
      • 1...b3
        • 2.Qd6#
      • 1...Bb3
        • 2.Qc1#
      • 1...Be8
        • 2.Sc4#

Anticipated by 18099(1953)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(B)
        • B(c);N_GUARD::S(C)
      • Refutation
        • B(c);
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(B)
        • B(c);SBLOCK::QAB(B)
        • B(c);::S(C)
      • Refutation
        • P(b);XS(C)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • P(b);OGATEB,SBLOCK::QAB(B)
      • B(c);SBLOCK::QAB(B)
      • B(c);N_GUARD::S(C)
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