MESON Chess Problem Database

Problem Display
PID: 169038 (8/4N3/3pkP2/2P1P1P1/4Q3/3K4/8/8 w - - 0 1)

Oganesyan, Alexei Sergeevich

SuperProblem 100. TT, 2013

8/4N3/3pkP2/2P1P1P1/4Q3/3K4/8/8

#2

7 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qd5#
    • 1...dxe5
      • 2.Qd5#
    • 1...d5
      • 2.Qxd5#
  • Tries
    • 1.Qc6?
      • 1...Kxe5
        • 2.Qe4#
        • 2.Qxd6#
      • 1...Kf7!
    • 1.Qb7?
      • 1...Kxe5
        • 2.Qe4#
      • 1...dxc5
        • 2.Qd5#
      • 1...dxe5
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kf7!
    • 1.Qc4+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...d5
        • 2.Qxd5#
      • 1...Kd7!
    • 1.Qg4+?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qe4#
      • 1...Kf7!
    • 1.c6?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kf7!
  • Keys
    • 1.Qa8!
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#
      • 1...dxc5
        • 2.Qd5#
      • 1...dxe5
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);XP(C)::QAB1(B)
    • P(a);P_SPINP(a),XP(D)::QAB1(B)
    • P(a);::QAB1(B),XP(a)
  • Tries
    • Try
      • Q(B);P_PINP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(D)::QAR1(B)
        • P(a);XP(C)::QAB1(B)
        • P(a);XP(D)::QAB1(B)
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(D)::QAR1(B)
        • P(a);P_SPINP(a)::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(C);
      • Threat
        • QAB1(B)
      • Vars
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(D)::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);XP(C)::QAB1(B)
      • P(a);XP(D)::QAB1(B)
      • P(a);::QAB1(B),XP(a)
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