MESON Chess Problem Database

Problem Display
PID: 228301 (2n2N2/3p3B/3b1P2/1PpkP1K1/1p2N1p1/1P1p4/5B2/Qb2r3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Schweizerische Schachzeitung, 1986

2n2N2/3p3B/3b1P2/1PpkP1K1/1p2N1p1/1P1p4/5B2/Qb2r3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Bg8#
    • 1...Bxe5
      • 2.Qa8#
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Kf4?
      • threat
        • 2.Bg8#
        • 2.Qa8#
      • 1...Rxe4+
        • 2.Bxe4#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Bxf8
        • 2.Bg8#
      • 1...Re3
        • 2.Bg8#
      • 1...Ba2
        • 2.Bg8#
      • 1...Sb6
        • 2.Bg8#
      • 1...Sa7
        • 2.Bg8#
      • 1...Se7!
    • 1.Kf5?
      • threat
        • 2.Bg8#
        • 2.Qa8#
      • 1...Re3
        • 2.Bg8#
      • 1...Ba2
        • 2.Bg8#
      • 1...Sb6
        • 2.Bg8#
      • 1...Sa7
        • 2.Bg8#
      • 1...Se7+!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Sf4#
      • 1...Kxe4
        • 2.Qa8#
      • 1...Ke6
        • 2.Bg8#
      • 1...Rxe4
        • 2.Bg8#
      • 1...Bxe5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK,XS(D)::B(I)
    • B(h);SBLOCK,XP(F)::QAB(A)
    • P(f);N_GUARD::QAR1(A)
  • Tries
    • Try
      • K(G);P_SPINP(F),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,OGATE,XS(D)::B(I),XR(b)
        • B(h);CHECK,OGATE,XP(F)::QAR1(A),XB(h)
        • B(h);N_PINP(F),XS(J)::B(I)
        • R(b);::B(I)
        • B(a);::B(I)
        • S(j);::B(I)
      • Refutation
        • S(j);
    • Try
      • K(G);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::B(I)
        • B(a);::B(I)
        • S(j);::B(I)
      • Refutation
        • S(j);CHECK
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • K(g);S_FLIGHT,XS(D)::QAB(A)
      • K(g);S_FLIGHT::B(I)
      • R(b);SBLOCK,XS(D)::B(I)
      • B(h);OGATE,XP(F)::QAR1(A),XB(h)
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).