MESON Chess Problem Database

Problem Display
PID: 235032 (2r5/3B4/3Q4/3pn1n1/p1pkp2r/R1pP2B1/KP1bP2q/2NR1N2 w - - 0 1)

Erokhin, Vladimir Alekseevich

Hlas l'udu, 1989

2r5/3B4/3Q4/3pn1n1/p1pkp2r/R1pP2B1/KP1bP2q/2NR1N2

#2

11 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Bxe5#
    • 1...Qh1
      • 2.Bxe5#
    • 1...Qxe2
      • 2.Bxe5#
    • 1...Qf2
      • 2.Bxe5#
    • 1...Qg2
      • 2.Bxe5#
    • 1...Qh3
      • 2.Bxe5#
    • 1...Rc5
      • 2.Qxe5#
    • 1...Ra8
      • 2.Qb6#
    • 1...Rd8
      • 2.Qb6#
    • 1...Re8
      • 2.Qb6#
    • 1...Rf8
      • 2.Qb6#
    • 1...Rg8
      • 2.Qb6#
    • 1...Rh8
      • 2.Qb6#
    • 1...Bxc1
      • 2.bxc3#
    • 1...Be1
      • 2.e3#
    • 1...Be3
      • 2.bxc3#
    • 1...Bf4
      • 2.bxc3#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qxd5#
      • 1...Rc5
        • 2.Qxe5#
      • 1...Rd8
        • 2.Qb6#
      • 1...Sxe6!
    • 1.dxc4?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Rxa4#
      • 1...Rxc4
        • 2.e3#
      • 1...Sxc4
        • 2.bxc3#
      • 1...Rc5!
  • Keys
    • 1.dxe4!
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Rxe4
        • 2.bxc3#
      • 1...Sxe4
        • 2.e3#
      • 1...Rc5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 16
  • Sets
    • Q(b);N_GUARD::B(I),XS(j)
    • Q(b);N_GUARD,XP(F)::B(I),XS(j)
    • R(l);SBLOCK::QAB1(J),XS(j)
    • R(l);N_GUARD::QAB(J)
    • B(a);N_GUARD,XS(A)::P(E),XP(c)
    • B(a);N_GUARD::P(F)
    • B(a);N_GUARD::P(E),XP(c)
  • Tries
    • Try
      • B(K);
      • Threat
        • QAR1(J),XP(i)
      • Vars
        • R(l);SBLOCK::QAB1(J),XS(j)
        • R(l);N_GUARD::QAB(J)
      • Refutation
        • S(k);XB(K)
    • Try
      • P(H);P_PINB(a),XP(e)
      • Threat
        • QAR1(J),XP(i)
      • Vars
        • K(f);N_SPINB(a),N_SPINP(i),OGATEB,P-FLIGHT,XP(H)::R(G),XP(d)
        • R(l);SBLOCK,XP(H)::P(F)
        • S(j);SBLOCK,XP(H)::P(E),XP(c)
      • Refutation
        • R(l);
  • Actual
    • P(H);P_PINB(a),XP(g)
    • Threat
      • QAR1(J),XP(i)
    • Vars
      • K(f);N_SPINB(a),N_SPINP(i),P-FLIGHT,XP(H)::QAR1(J),XS(j)
      • R(h);SBLOCK,XP(H)::P(E),XP(c)
      • S(k);SBLOCK,XP(H)::P(F)
      • R(l);SBLOCK::QAB1(J),XS(j)
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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).