MESON Chess Problem Database

Problem Display
PID: 103868 (8/8/8/4Q3/8/N1K5/pr1P4/k2B4 w - - 0 1)

Antonov, Yuri Mikhailovich

Sachove umeni (Ceskoslovensky sach), 1975

8/8/8/4Q3/8/N1K5/pr1P4/k2B4

#2

5 + 3

6490 yacpdb 2009
3713 Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sc2#
    • 1...Rc2+
      • 2.Kxc2#
    • 1...Rxd2
      • 2.Kxd2#
    • 1...Rb3+
      • 2.Kxb3#
    • 1...Rb4
      • 2.Kxb4#
  • Tries
    • 1.Sc2+?
      • 1...Rxc2+
        • 2.Kxc2#
      • 1...Kb1!
    • 1.Qe1?
      • 1...Rc2+
        • 2.Bxc2#
      • 1...Rb3+
        • 2.Bxb3#
      • 1...Rb5
        • 2.Bb3#
      • 1...Rb1
        • 2.Sc2#
      • 1...Rb4
        • 2.Bb3#
      • 1...Rb6
        • 2.Bb3#
      • 1...Rb7
        • 2.Bb3#
      • 1...Rb8
        • 2.Bb3#
      • 1...Rxd2!
  • Keys
    • 1.Bb3!
      • 1...Rc2+
        • 2.Kxc2#
      • 1...Rxb3+
        • 2.Kxb3#
      • 1...Rxd2
        • 2.Kxd2#
      • 1...Rb1
        • 2.Sc2#

Anticipated by 273389(1972)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD,SBLOCK::S(C)
    • R(c);CHECK::QAB(E)+K(D),XR(c)
    • R(c);XP(B)::QAB(E)+K(D),XR(c)
    • R(c);::QAB(E)+K(D),XR(c)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(c);CHECK,XS(C)::QAB(E)+K(D),XR(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • R(c);CHECK,N_GUARD::QAR(E)+B(A),XR(c)
        • R(c);N_GUARD::QAR(E)+B(A)
        • R(c);N_GUARD,SBLOCK::S(C)
      • Refutation
        • R(c);XP(B)
  • Actual
    • B(A);
    • Vars
      • R(c);CHECK::QAB(E)+K(D),XR(c)
      • R(c);CHECK,XB(A)::QAB(E)+K(D),XR(c)
      • R(c);XP(B)::QAB(E)+K(D),XR(c)
      • R(c);N_GUARD,SBLOCK::S(C)
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