MESON Chess Problem Database

Problem Display
PID: 160163 (5R2/8/8/8/2Q5/8/4p2K/1N1k4 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

5R2/8/8/8/2Q5/8/4p2K/1N1k4

#2

4 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qc1#
    • 1...e1R
      • 2.Rd8#
  • Tries
    • 1.Qxe2+?
      • 1...Kc1
        • 2.Rf1#
      • 1...Kxe2!
    • 1.Qb3+?
      • 1...Kc1
        • 2.Rc8#
      • 1...Ke1!
    • 1.Qd3+?
      • 1...Ke1
        • 2.Qd2#
      • 1...Kc1!
    • 1.Qc2+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qd2#
      • 1...Kxc2!
  • Keys
    • 1.Rf2!
      • 1...Ke1
        • 2.Qxe2#
      • 1...e1Q
        • 2.Qc2#
      • 1...e1S
        • 2.Rd2#
      • 1...e1B
        • 2.Qc2#
      • 1...e1R
        • 2.Rd2#
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(C)
    • P(b);SBLOCK::R(D)
  • Tries
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • R(D);
    • Vars
      • K(a);P-FLIGHT::QAR1(C),XP(b)
      • P(b);SBLOCK::QAB1(C)
      • P(b);OGATE,SBLOCK::R1(D)
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