MESON Chess Problem Database

Problem Display
PID: 103768 (8/5N2/8/5p2/2K1k3/5N2/8/3Q4 w - - 0 1)

Shakhnazaryan, Albert Serapionovic

Smena, 1993

8/5N2/8/5p2/2K1k3/5N2/8/3Q4

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qd3#
  • Tries
    • 1.Se1?
      • threat
        • 2.Qf3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qf3#
      • 1...f4
        • 2.Qd3#
      • 1...Ke3!
    • 1.Sd2+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Ke3!
    • 1.Sh2?
      • threat
        • 2.Qf3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qf3#
      • 1...f4
        • 2.Qd3#
      • 1...Ke3!
    • 1.Sd4?
      • threat
        • 2.Qf3#
      • 1...Kf4
        • 2.Qf3#
      • 1...Ke3!
    • 1.Sh4?
      • threat
        • 2.Qf3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qf3#
      • 1...Ke3!
    • 1.S3e5?
      • threat
        • 2.Qf3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qf3#
      • 1...f4
        • 2.Qd3#
      • 1...Ke3!
    • 1.S3g5+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Ke3!
    • 1.S7g5+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kf4!
    • 1.Qb3?
      • 1...f4
        • 2.Sd6#
        • 2.Qd3#
      • 1...Kf4!
    • 1.Qd2?
      • threat
        • 2.S3g5#
        • 2.S7g5#
      • 1...f4
        • 2.Qd3#
      • 1...Kxf3!
  • Keys
    • 1.Sg1!
      • threat
        • 2.Qf3#
        • 2.Qd4#
      • 1...Ke3
        • 2.Qd4#
      • 1...Kf4
        • 2.Qf3#
      • 1...f4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB1(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
      • P(b);SBLOCK::QAB1(A)
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