MESON Chess Problem Database

Problem Display
PID: 93369 (8/N4p2/R3bB2/1Pk5/2p5/8/1N6/1Q4K1 w - - 0 1)

Marandiuk, Mikhail Nazarovich

Komandnoe pervenstvo SSSR, 1975

8/N4p2/R3bB2/1Pk5/2p5/8/1N6/1Q4K1

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Sd3#
    • 1...Bd5
      • 2.Sa4#
  • Tries
    • 1.Qc2?
      • 1...Kb4
        • 2.Be7#
      • 1...Kd5
        • 2.Qxc4#
      • 1...Bh3
        • 2.Qxc4#
      • 1...Bg4
        • 2.Qxc4#
      • 1...Bd5
        • 2.Sd3#
      • 1...Bf5
        • 2.Qxc4#
      • 1...Bd7
        • 2.Qxc4#
      • 1...Bc8
        • 2.Qxc4#
      • 1...c3!
    • 1.Qd3?
      • threat
        • 2.Be7#
        • 2.Qd6#
      • 1...Kb4
        • 2.Be7#
        • 2.Qa3#
      • 1...Bd5
        • 2.Be7#
        • 2.Qa3#
      • 1...cxd3!
    • 1.Qd1?
      • threat
        • 2.Be7#
        • 2.Qd6#
      • 1...Bd5
        • 2.Be7#
      • 1...Kb4!
  • Keys
    • 1.Qa2!
      • 1...Kb4
        • 2.Qa3#
      • 1...Kd5
        • 2.Qxc4#
      • 1...Bh3
        • 2.Qxc4#
      • 1...Bg4
        • 2.Qxc4#
      • 1...Bd5
        • 2.Qa3#
      • 1...Bf5
        • 2.Qxc4#
      • 1...Bd7
        • 2.Qxc4#
      • 1...Bc8
        • 2.Qxc4#
      • 1...c3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR(A)+S(C),DCHECK
    • B(c);SBLOCK::S(C)
  • Tries
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(F)
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
        • B(c);N_GUARD::QAR1(A),XP(a)
        • B(c);SBLOCK::S(C)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::B(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
      • B(c);N_GUARD::QAR1(A),XP(a)
      • B(c);SBLOCK::QAB(A)
      • P(a);N_GUARD::S(C)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).