MESON Chess Problem Database

Problem Display
PID: 177986 (4R3/1p1N4/1P1N4/2p2p1K/p1Pk4/Q2p1B2/3b3B/3n1b2 w - - 0 1)

Pavlov, Mikhail Aleksandrovich

Sahs (Latvia), 1986

4R3/1p1N4/1P1N4/2p2p1K/p1Pk4/Q2p1B2/3b3B/3n1b2

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Qxc5#
    • 1...Be3
      • 2.Be5#
    • 1...Sc3
      • 2.Qxc5#
    • 1...Se3
      • 2.Be5#
    • 1...f4
      • 2.Re4#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Sb5#
        • 2.Sxf5#
      • 1...Bh3
        • 2.Sb5#
      • 1...Sc3
        • 2.Sxf5#
        • 2.Qxc5#
      • 1...Se3
        • 2.Sb5#
        • 2.Be5#
      • 1...f4
        • 2.Sb5#
        • 2.Sf5#
        • 2.Re4#
      • 1...Be2+!
    • 1.Qa2?
      • threat
        • 2.Sb5#
      • 1...Sc3
        • 2.Sxf5#
      • 1...Kc3!
    • 1.Qb3?
      • threat
        • 2.Sb5#
        • 2.Sxf5#
      • 1...Bh3
        • 2.Sb5#
      • 1...Sc3
        • 2.Sxf5#
      • 1...Se3
        • 2.Sb5#
        • 2.Be5#
      • 1...f4
        • 2.Sb5#
        • 2.Sf5#
        • 2.Re4#
      • 1...axb3!
    • 1.Qxa4?
      • threat
        • 2.Sb5#
      • 1...Kc3
        • 2.Be5#
      • 1...Sc3
        • 2.Sxf5#
      • 1...Bb4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sxf5#
      • 1...Ke3
        • 2.Qxc5#
      • 1...Bh3
        • 2.Qxd3#
      • 1...Se3
        • 2.Sb5#
      • 1...f4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(c);SBLOCK::QAB1(B),XP(g)
    • B(c);SBLOCK::B(A)
    • S(a);SBLOCK::QAB1(B),XP(g)
    • S(a);SBLOCK::B(A)
    • P(h);N_GUARD::R1(I)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::S(G)
      • Refutation
        • B(b);CHECK
    • Try
      • Q(B);
      • Threat
        • S(G)
      • Vars
        • S(a);SBLOCK::S(G),XP(h)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::S(G)
        • S(a);::S(G),XP(h)
      • Refutation
        • P(e);XQ(B)
    • Try
      • Q(B);XP(e)
      • Threat
        • S(G)
      • Vars
        • K(f);S_FLIGHT::B(A)
        • S(a);SBLOCK::S(G),XP(h)
      • Refutation
        • B(c);
  • Actual
    • S(H);
    • Threat
      • S(G),XP(h)
    • Vars
      • K(f);P_SPINP(d),S_FLIGHT::QAB(B),XP(g)
      • B(b);N_GUARD::QAR1(B),XP(d)
      • S(a);SBLOCK::S(G)
      • P(h);::S(G)
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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).