MESON Chess Problem Database

Problem Display
PID: 159143 (3rBB2/n1nR4/1pQ5/1b5R/k7/3P3K/2P1p3/8 w - - 0 1)

Agapov, Igor Alexeyevich

Live Journal, 2011

3rBB2/n1nR4/1pQ5/1b5R/k7/3P3K/2P1p3/8

#2

8 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Rxa7#
    • 1...Se6
      • 2.Rxa7#
    • 1...Sa8
      • 2.Rxa7#
    • 1...Sxe8
      • 2.Rxa7#
  • Tries
    • 1.Qe4+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Ka5!
    • 1.Qxb5+?
      • 1...Scxb5
        • 2.Rxa7#
      • 1...Saxb5!
    • 1.Qd5?
      • threat
        • 2.Qa2#
      • 1...Ka5
        • 2.Qa2#
      • 1...Sxd5
        • 2.Rxa7#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bxd7+!
    • 1.Qc3?
      • threat
        • 2.Qa1#
        • 2.Qb4#
        • 2.Qa3#
      • 1...e1Q
        • 2.Qa3#
      • 1...e1B
        • 2.Qa1#
        • 2.Qa3#
      • 1...e1R
        • 2.Qb4#
        • 2.Qa3#
      • 1...Bc4
        • 2.Qb4#
        • 2.Qa3#
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qa1#
        • 2.Qa3#
      • 1...Sd5
        • 2.Rxa7#
        • 2.Qa1#
        • 2.Qa3#
      • 1...Sa6
        • 2.Qa1#
        • 2.Qa3#
      • 1...Bxd7+!
    • 1.Qc4+?
      • 1...Ka5
        • 2.Qa2#
      • 1...Bxc4!
    • 1.Qd6?
      • threat
        • 2.Qa3#
        • 2.Qb4#
      • 1...Ka5
        • 2.Qa3#
      • 1...e1Q
        • 2.Qa3#
      • 1...e1B
        • 2.Qa3#
      • 1...Sc6
        • 2.Qa3#
      • 1...Sd5
        • 2.Rxa7#
        • 2.Qa3#
      • 1...Sa6
        • 2.Qa3#
      • 1...Bxd7+!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qa2#
      • 1...Ka5
        • 2.Qa2#
      • 1...Bxd7
        • 2.Qg4#
      • 1...Sxe6
        • 2.Rxa7#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Rxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(f);OGATE::R(F),XS(e)
    • S(f);OGATE,XB(G)::R(F),XS(e)
  • Tries
    • Try
      • Q(E);CHECK,N_PINB(c)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR2(E),XB(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINB(c)
    • Try
      • Q(E);CHECK,XB(c)
      • Vars
        • S(f);OGATE,XQ(E)::R(F),XS(e)
      • Refutation
        • S(e);XQ(E)
    • Try
      • Q(E);N_PINB(c)
      • Threat
        • QAR2(E)
      • Vars
        • K(b);P-FLIGHT,P_SPINB(c)::QAR(E)
        • S(f);OGATE,XQ(E)::R(F),XS(e)
        • B(c);N_GUARD::QAR2(E),XB(c)
      • Refutation
        • B(c);CHECK,P_SPINB(c),XR(F)
    • Try
      • Q(E);N_PINB(c)
      • Threat
        • DUALS(3)
      • Vars
        • P(a);::QAR1(E)
      • Refutation
        • B(c);CHECK,P_SPINB(c),XR(F)
    • Try
      • Q(E);CHECK,N_PINB(c)
      • Vars
        • K(b);P-FLIGHT,P_SPINB(c)::QAR(E)
      • Refutation
        • B(c);XQ(E)
    • Try
      • Q(E);N_PINB(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT,P_SPINB(c)::QAR2(E)
        • P(a);::QAR1(E)
        • S(e);::QAR1(E)
        • S(f);::QAR1(E)
      • Refutation
        • B(c);CHECK,P_SPINB(c),XR(F)
  • Actual
    • Q(E);N_PINB(c)
    • Threat
      • QAR2(E)
    • Vars
      • K(b);P-FLIGHT,P_SPINB(c)::QAR(E)
      • B(c);N_GUARD,P_PINQ(E),P_SPINB(c),XR(F)::QAR(E)
      • S(f);OGATE,XQ(E)::R(F),XS(e)
      • B(c);N_GUARD::QAR2(E),XB(c)
      • S(f);OGATE::R(F),XS(e)
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).