MESON Chess Problem Database

Problem Display
PID: 136259 (4Q3/1b2K2p/2P1p3/3N2nR/R1Pk1B2/2pP1P2/2p1p1r1/2N1n3 w - - 0 1)

Bourd, Evgeny

Source?, 0000

4Q3/1b2K2p/2P1p3/3N2nR/R1Pk1B2/2pP1P2/2p1p1r1/2N1n3

#2

11 + 10

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Sb3#
      • 2.Be3#
    • 1...Sxd3
      • 2.Sb3#
    • 1...Sxf3
      • 2.Be3#
    • 1...Sh3
      • 2.Be3#
    • 1...Se4
      • 2.Be3#
    • 1...Sf7
      • 2.Be3#
    • 1...e5
      • 2.Be3#
  • Tries
    • 1.Kf6?
      • threat
        • 2.Be3#
      • 1...Kc5
        • 2.Sb3#
      • 1...Se4+!
    • 1.Sb4?
      • threat
        • 2.Sb3#
      • 1...Kc5
        • 2.Be3#
      • 1...Sxd3!
    • 1.Be5+?
      • 1...Kc5
        • 2.Sb3#
        • 2.Ra5#
        • 2.d4#
      • 1...Kxe5!
    • 1.Rxg5?
      • threat
        • 2.Be3#
      • 1...Kc5
        • 2.Sb3#
        • 2.Be3#
      • 1...exd5
        • 2.Rxd5#
      • 1...Rxg5!
    • 1.Qb8?
      • threat
        • 2.Be3#
        • 2.Qa7#
      • 1...Sxd3
        • 2.Sb3#
        • 2.Be3#
      • 1...exd5
        • 2.Qa7#
      • 1...Se4
        • 2.Be3#
      • 1...Kc5!
    • 1.Qh8+?
      • 1...e5
        • 2.Be3#
      • 1...Kc5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qb6#
      • 1...Kc5
        • 2.Qb6#
      • 1...Sxd3
        • 2.Sb3#
      • 1...Se4
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(a);SBLOCK,XP(B)::S(A)
    • S(g);XP(C)::B(F)
    • S(g);::B(F)
    • P(h);SBLOCK::B(F)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • B(F)
      • Vars
        • K(f);S_FLIGHT::S(A)
      • Refutation
        • S(g);CHECK
    • Try
      • S(G);
      • Threat
        • S(A)
      • Vars
        • K(f);P_SPINS(g),S_FLIGHT::B(F)
      • Refutation
        • S(a);XP(B)
    • Try
      • B(F);CHECK
      • Refutation
        • K(f);P_SPINS(g),S_FLIGHT,XB(F)
    • Try
      • R(H);XS(g)
      • Threat
        • B(F)
      • Vars
        • P(h);OGATE,XS(G)::R1(H),XP(h)
      • Refutation
        • R(d);XR(H)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XS(G)::QAB(K)
        • S(g);::B(F)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • P(h);P_SPINP(h)::B(F)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(K);
    • Threat
      • QAB(K)
    • Vars
      • K(f);S_FLIGHT::QAB1(K)
      • S(a);SBLOCK,XP(B)::S(A)
      • S(g);::B(F)
HTML5 logo

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).