MESON Chess Problem Database

Problem Display
PID: 229017 (2R5/r1b5/1Q1p4/r6B/P1kp1N1R/7p/3pN2K/8 w - - 0 1)

Cassinelli, A

El Ajedrez Argentino, 1926

2R5/r1b5/1Q1p4/r6B/P1kp1N1R/7p/3pN2K/8

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qxb5#
    • 1...R5a6
      • 2.Qb5#
  • Tries
    • 1.Bf7+?
      • 1...Rd5
        • 2.Bxd5#
        • 2.Qb5#
      • 1...d5!
    • 1.Rxc7+?
      • 1...Rc5
        • 2.Qb5#
      • 1...Rxc7!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Rxd4#
      • 1...d5+
        • 2.Se5#
      • 1...Kxd3
        • 2.Qb3#
      • 1...Kd5
        • 2.Bf7#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rd5
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::QAB1(G),XR(e)
    • R(e);N_GUARD::QAB1(G)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • P(f);P_PINS(D),P_SPINP(f)
    • Try
      • R(H);CHECK,XB(h)
      • Vars
        • R(e);P_SPINR(e)::QAB1(G)
      • Refutation
        • R(g);XR(H)
  • Actual
    • S(D);P_PINP(d)
    • Threat
      • R1(E),XP(d)
    • Vars
      • P(f);CHECK,N_GUARD,SBLOCK,S_CUTR(e)::S(D)
      • K(c);N_SPINB(h),N_SPINP(d),S_FLIGHT,XS(D)::QAR2(G)
      • K(c);N_SPINB(h),N_SPINP(d),S_FLIGHT::B(F)
      • R(e);N_GUARD::QAB1(G),XR(e)
      • R(e);SBLOCK::S(D)
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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).