MESON Chess Problem Database

Problem Display
PID: 225397 (8/Q7/KPN3n1/p2N4/5p2/1P1k1P2/RR2nP2/3r4 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

4th HM., Praca, 1999

8/Q7/KPN3n1/p2N4/5p2/1P1k1P2/RR2nP2/3r4

#2

10 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rd2#
    • 1...Rb1
      • 2.Rd2#
    • 1...Rc1
      • 2.Rd2#
    • 1...Re1
      • 2.Rd2#
    • 1...Rf1
      • 2.Rd2#
    • 1...Rg1
      • 2.Rd2#
    • 1...Rh1
      • 2.Rd2#
    • 1...Rd2
      • 2.Rxd2#
  • Tries
    • 1.Kxa5?
      • threat
        • 2.Qa6#
      • 1...Rc1
        • 2.Rd2#
      • 1...Sc3
        • 2.Sdb4#
      • 1...Sd4
        • 2.Scb4#
      • 1...Se5!
    • 1.Qh7?
      • threat
        • 2.Qxg6#
      • 1...Rg1
        • 2.Rd2#
      • 1...Sc3
        • 2.Sxf4#
      • 1...Sd4
        • 2.Se5#
      • 1...Sg3!
  • Keys
    • 1.b7!
      • 1...Sc1
        • 2.Qd4#
      • 1...Ra1
        • 2.Rd2#
      • 1...Rb1
        • 2.Rd2#
      • 1...Rc1
        • 2.Rd2#
      • 1...Re1
        • 2.Rd2#
      • 1...Rf1
        • 2.Rd2#
      • 1...Rg1
        • 2.Rd2#
      • 1...Rh1
        • 2.Rd2#
      • 1...Rd2
        • 2.Rxd2#
      • 1...Sg1
        • 2.Qd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sg3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sh4
        • 2.Se5#
      • 1...Se5
        • 2.Sxe5#
      • 1...Se7
        • 2.Se5#
      • 1...Sf8
        • 2.Se5#
      • 1...Sh8
        • 2.Se5#
      • 1...a4
        • 2.Scb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::R1(B)
    • R(a);N_GUARD::R1(B),XR(a)
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(e)
      • Threat
        • QAB(J)
      • Vars
        • R(a);N_GUARD::R1(B)
        • S(b);SBLOCK::S(F)
        • S(b);SBLOCK::S(I)
      • Refutation
        • S(f);
    • Try
      • Q(J);P_PINS(f)
      • Threat
        • QAB(J),XS(f)
      • Vars
        • R(a);N_GUARD::R1(B)
        • S(b);N_GUARD,SBLOCK::S(F),XP(d)
        • S(b);SBLOCK::S(I)
      • Refutation
        • S(b);
  • Actual
    • P(H);
    • Vars
      • S(b);N_GUARD::QAR1(J)
      • R(a);N_GUARD::R1(B)
      • R(a);N_GUARD::R1(B),XR(a)
      • S(b);N_GUARD::QAR1(J),XS(b)
      • S(f);N_GUARD::S(I)
      • S(f);N_GUARD::S(I),XS(f)
      • P(e);N_GUARD::S(I)
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