MESON Chess Problem Database

Problem Display
PID: 171420 (3K4/2P5/1b1k4/8/1N3N2/2Q5/8/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Vecherni Magadan, 1997

3K4/2P5/1b1k4/8/1N3N2/2Q5/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.c8S#
    • 1...Bf2
      • 2.c8S#
    • 1...Be3
      • 2.c8S#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Ba5
      • 2.Qd4#
    • 1...Bc5
      • 2.Qf6#
      • 2.c8S#
    • 1...Ba7
      • 2.c8S#
    • 1...Bxc7+
      • 2.Qxc7#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Qf6#
      • 1...Bxc7+
        • 2.Qxc7#
      • 1...Bd4!
    • 1.Qg7?
      • threat
        • 2.Qe7#
      • 1...Bxc7+
        • 2.Qxc7#
      • 1...Kc5!
    • 1.Qc4?
      • threat
        • 2.Qd5#
      • 1...Bxc7+
        • 2.Qxc7#
      • 1...Ke5!
  • Keys
    • 1.Sbd3!
      • threat
        • 2.Qf6#
      • 1...Bxc7+
        • 2.Qxc7#
      • 1...Bd4
        • 2.c8S#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • B(a);N_PINP(D)::P=S
    • B(a);N_GUARD,N_PINP(D)::QAR2(A),XB(a)
    • B(a);N_GUARD::QAR2(A)
    • B(a);CHECK,OGATE,XP(D)::QAB1(A),XB(a)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR2(A)
      • Vars
        • B(a);CHECK,OGATE,XP(D)::QAB1(A),XB(a)
      • Refutation
        • B(a);N_PINP(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);CHECK,OGATE,XP(D)::QAB1(A),XB(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);CHECK,OGATE,XP(D)::QAB1(A),XB(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR2(A)
    • Vars
      • B(a);CHECK,OGATE,XP(D)::QAB1(A),XB(a)
      • B(a);N_PINP(D)::P=S
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