MESON Chess Problem Database

Problem Display
PID: 9460 (1R6/8/2p2Q2/kb6/8/1R6/1K6/8 w - - 0 1)

Maksimov, Nikolai Ivanovich

Source?, 0000

1R6/8/2p2Q2/kb6/8/1R6/1K6/8

#2

4 + 3

4331 Schachminiaturen II 1903
3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Ra3#
    • 1...Be2
      • 2.Ra3#
    • 1...Bd3
      • 2.Ra3#
    • 1...Ba4
      • 2.Ra8#
    • 1...Bc4
      • 2.Ra3#
    • 1...Ba6
      • 2.Ra3#
  • Tries
    • 1.Ra3+?
      • 1...Kb4
        • 2.Qc3#
        • 2.Qd4#
      • 1...Ba4!
    • 1.Qc3+?
      • 1...Ka4
        • 2.Ra3#
        • 2.Qb4#
      • 1...Ka6!
    • 1.Qd4?
      • 1...Ka6
        • 2.Qb6#
      • 1...Bc4
        • 2.Ra3#
      • 1...Bf1
        • 2.Ra3#
      • 1...Be2
        • 2.Ra3#
      • 1...Bd3
        • 2.Ra3#
      • 1...Ba4
        • 2.Ra8#
        • 2.Qb6#
        • 2.Qa7#
      • 1...Ba6
        • 2.Ra3#
        • 2.Qb4#
      • 1...c5!
    • 1.Qd8+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Ka4!
    • 1.Qxc6?
      • threat
        • 2.Qxb5#
      • 1...Ka4
        • 2.Ra8#
        • 2.Qxb5#
      • 1...Bf1
        • 2.Ra3#
      • 1...Be2
        • 2.Ra3#
      • 1...Bd3
        • 2.Ra3#
      • 1...Ba4
        • 2.Ra8#
        • 2.Qa8#
        • 2.Qb6#
      • 1...Bc4
        • 2.Ra3#
      • 1...Ba6
        • 2.Ra3#
      • 1...Bxc6!
  • Keys
    • 1.Qf1!
      • 1...Ka4
        • 2.Qa1#
      • 1...Ka6
        • 2.Ra3#
      • 1...Bxf1
        • 2.Ra3#
      • 1...c5
        • 2.Qxb5#
      • 1...Be2
        • 2.Ra3#
        • 2.Qa1#
      • 1...Bd3
        • 2.Ra3#
        • 2.Qa1#
      • 1...Ba4
        • 2.Ra8#
      • 1...Bc4
        • 2.Ra3#
        • 2.Qa1#
      • 1...Ba6
        • 2.Ra3#
        • 2.Qa1#

This anticipates 165241(1964)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::R(B)
    • B(b);N_GUARD,SBLOCK::R(D)
    • B(b);N_GUARD,SBLOCK::R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • B(b);N_GUARD::R(B)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);XP(c)
      • Threat
        • QAR1(C),XB(b)
      • Vars
        • B(b);N_GUARD::R(B)
      • Refutation
        • B(b);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR(C)
      • K(a);P-FLIGHT,P_SPINB(b)::R(B)
      • B(b);N_GUARD,XQ(C)::R(B)
      • P(c);N_GUARD::QAR1(C),XB(b)
      • B(b);N_GUARD,SBLOCK::R(D)
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