MESON Chess Problem Database

Problem Display
PID: 164201 (1kb5/Rp6/8/N3K3/2Q5/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

1kb5/Rp6/8/N3K3/2Q5/8/8/8

#2

4 + 3

15634 Kuban segodniya 2001
15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Sc6#
      • 2.Qc7#
    • 1...b6
      • 2.Sc6#
      • 2.Qc7#
  • Tries
    • 1.Rxb7+?
      • 1...Ka8
        • 2.Qa6#
        • 2.Qxc8#
      • 1...Bxb7!
    • 1.Qd5?
      • 1...Kc7
        • 2.Qd6#
      • 1...Bh3
        • 2.Qxb7#
      • 1...Bg4
        • 2.Qxb7#
      • 1...Bf5
        • 2.Qxb7#
      • 1...Be6
        • 2.Qxb7#
      • 1...Bd7
        • 2.Qxb7#
      • 1...b5
        • 2.Sc6#
        • 2.Qa8#
      • 1...b6
        • 2.Sc6#
        • 2.Qa8#
      • 1...Kxa7!
    • 1.Qb4?
      • 1...Kc7
        • 2.Qd6#
      • 1...Bh3
        • 2.Qxb7#
      • 1...Bg4
        • 2.Qxb7#
      • 1...Bf5
        • 2.Qxb7#
      • 1...Be6
        • 2.Qxb7#
      • 1...Bd7
        • 2.Qxb7#
      • 1...b5
        • 2.Sc6#
      • 1...b6
        • 2.Sc6#
      • 1...Kxa7!
    • 1.Qc6?
      • 1...bxc6
        • 2.Sxc6#
      • 1...Bh3
        • 2.Qxb7#
      • 1...Bg4
        • 2.Qxb7#
      • 1...Bf5
        • 2.Qxb7#
      • 1...Be6
        • 2.Qxb7#
      • 1...Bd7
        • 2.Qxb7#
      • 1...b5
        • 2.Ra8#
        • 2.Qa8#
        • 2.Qc7#
      • 1...b6
        • 2.Ra8#
        • 2.Qa8#
        • 2.Qc7#
      • 1...Kxa7!
    • 1.Qxc8+?
      • 1...Kxa7
        • 2.Qxb7#
      • 1...Kxc8!
  • Keys
    • 1.Qa6!
      • 1...Kc7
        • 2.Qd6#
      • 1...bxa6
        • 2.Sc6#
      • 1...Bh3
        • 2.Qxb7#
      • 1...Bg4
        • 2.Qxb7#
      • 1...Bf5
        • 2.Qxb7#
      • 1...Be6
        • 2.Qxb7#
      • 1...Bd7
        • 2.Qxb7#
      • 1...b5
        • 2.Sc6#
      • 1...b6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK,XP(a)
      • Refutation
        • B(c);XR(D)
    • Try
      • Q(A);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB1(A)
        • B(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • B(c);N_GUARD::QAR1(A),XP(a)
        • P(a);::S(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Vars
        • P(a);XQ(A)::S(B),XP(a)
        • B(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(A);CHECK,XB(c)
      • Vars
        • K(b);S_FLIGHT,XR(D)::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAB1(A)
      • P(a);N_GUARD,XQ(A)::S(B)
      • B(c);N_GUARD::QAR1(A),XP(a)
      • P(a);N_GUARD::S(B)
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