MESON Chess Problem Database

Problem Display
PID: 269113 (1n2B1K1/3Np3/2p1kPp1/2R2bp1/2p5/p4nB1/2N5/1Q6 w - - 0 1)

Belchikov, Nikolai Ivanovich

Khramtsevich, Mikhail Nikolaevich

Koshel, Mikhail Igorevich

1st Place, Match: Belarus - Donbass, 2017

1n2B1K1/3Np3/2p1kPp1/2R2bp1/2p5/p4nB1/2N5/1Q6

#2

8 + 10

17376 FIDE Album (2016-2018) 2022
6490 yacpdb 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Sd4#
    • 1...Sg1
      • 2.Sd4#
    • 1...Sd2
      • 2.Sd4#
    • 1...Sh2
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sh4
      • 2.Sd4#
    • 1...c3
      • 2.Qa2#
      • 2.Qb3#
  • Tries
    • 1.Re5+?
      • 1...Kd6
        • 2.Qxb8#
      • 1...Sxe5!
    • 1.Qd1?
      • threat
        • 2.Bf7#
      • 1...Sxd7
        • 2.Rxc6#
      • 1...exf6
        • 2.Qd6#
      • 1...Sd2
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Se5
        • 2.Rxe5#
      • 1...Bd3!
    • 1.Qe1+?
      • 1...Sxe1
        • 2.Sd4#
      • 1...Se5
        • 2.Qxe5#
      • 1...Be4!
    • 1.Qb2?
      • threat
        • 2.Sf8#
      • 1...Sxd7
        • 2.Bf7#
      • 1...exf6
        • 2.Qxf6#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sd4
        • 2.Sxd4#
      • 1...c3
        • 2.Qa2#
        • 2.Qb3#
      • 1...axb2!
    • 1.Qb7?
      • threat
        • 2.Bf7#
      • 1...Sxd7
        • 2.Qxc6#
      • 1...exf6
        • 2.Sf8#
      • 1...Se5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sf8#
      • 1...Sxd7
        • 2.Bf7#
      • 1...exf6
        • 2.Qxf6#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sd4
        • 2.Sxd4#
      • 1...c3
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(g);P-FLIGHT,S_CUTS(b)::QAB(A),XS(j)
      • Refutation
        • S(b);XR(D)
    • Try
      • Q(A);
      • Threat
        • B(G)
      • Vars
        • S(j);N_GUARD,XS(F)::R(D),XP(f)
        • P(i);N_GUARD,XP(E)::QAR1(A)
        • S(b);N_GUARD::S(B)
        • S(b);N_GUARD::S(B),XS(b)
        • S(b);N_GUARD::R1(D),XS(b)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);XQ(A)::S(B)
        • S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • S(j);SBLOCK,XS(F)::B(G)
        • P(i);OGATE,XP(E)::QAR1(A),XP(i)
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::S(B),XS(b)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • B(G)
      • Vars
        • S(j);N_GUARD,XS(F)::QAR2(A),XP(f)
        • P(i);SBLOCK,XP(E)::S(F)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • S(F)
    • Vars
      • S(j);SBLOCK,XS(F)::B(G)
      • P(i);OGATE,XP(E)::QAR1(A),XP(i)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • S(b);N_GUARD::S(B),XS(b)
      • P(c);OGATEB::QAB(A)
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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).