MESON Chess Problem Database

Problem Display
PID: 243101 (8/8/B2p4/2P2K2/3k1N2/8/7Q/8 w - - 0 1)

Armeni, Alberto

ChessStar, 2011

8/8/B2p4/2P2K2/3k1N2/8/7Q/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qd2#
  • Tries
    • 1.Se2+?
      • 1...Ke3
        • 2.Qf4#
      • 1...Kd5
        • 2.Qxd6#
      • 1...Kxc5!
    • 1.Sd5?
      • 1...Kxd5
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe5#
        • 2.Qd2#
      • 1...Kxc5!
    • 1.Se6+?
      • 1...Ke3
        • 2.Qf4#
        • 2.Qe2#
      • 1...Kd5
        • 2.Qxd6#
        • 2.Qh1#
        • 2.Qg2#
      • 1...Kc3!
    • 1.Qg3?
      • 1...dxc5
        • 2.Qd3#
      • 1...d5
        • 2.Se6#
      • 1...Kxc5!
    • 1.Qh3?
      • 1...dxc5
        • 2.Qd3#
      • 1...d5
        • 2.Se6#
      • 1...Kxc5!
  • Keys
    • 1.Sd3!
      • 1...Kc3
        • 2.Qb2#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kd5
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe5#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XP(C)::QAR2(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • S(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • S(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XP(C)::QAR1(A)
        • P(b);SBLOCK::S(B)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XP(C)::QAR1(A)
        • P(b);SBLOCK::S(B)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A),XP(b)
      • P(b);N_GUARD,XP(C)::QAB1(A)
      • P(b);N_GUARD::QAB1(A)
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