MESON Chess Problem Database

Problem Display
PID: 168989 (8/8/4K3/8/2Q5/4k2N/N1p3B1/4n3 w - - 0 1)

Shumarin, Vladimir Pavlovich

SuperProblem, 2016

8/8/4K3/8/2Q5/4k2N/N1p3B1/4n3

#2

5 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1?
      • threat
        • 2.Qf4#
      • 1...Sxg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kd2!
    • 1.Qd4+?
      • 1...Ke2
        • 2.Sc1#
        • 2.Sc3#
        • 2.Sg1#
        • 2.Sf4#
      • 1...Kxd4!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Bf1#
      • 1...Ke2!
  • Keys
    • 1.Bf1!
      • threat
        • 2.Qf4#
      • 1...Kd2
        • 2.Qe2#
      • 1...Kf3
        • 2.Qf4#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB1(D)
      • Vars
        • S(a);N_GUARD,XB(B)::QAR1(D)
        • S(a);N_GUARD::QAR1(D),XS(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::B(B)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAB1(D)
    • Vars
      • K(c);S_FLIGHT::QAR1(D)
      • K(c);P-FLIGHT::QAR1(D)
      • S(a);N_GUARD::QAR1(D)
      • S(a);N_GUARD::QAR1(D),XS(a)
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