MESON Chess Problem Database

Problem Display
PID: 47455 (3RK3/3nQn2/3b1pN1/6r1/1P1kNP1R/4rp2/BPP2B2/2q5 w - - 0 1)

Baev, Georgy S

Loshinski, Lev Ilich

Comm., Shakhmaty, 1929

3RK3/3nQn2/3b1pN1/6r1/1P1kNP1R/4rp2/BPP2B2/2q5

#2

12 + 9

5314 Grossmeister Shakhmatnoi Kompozitsii 1980
56 The Problemist 2003
5454 Near Snap 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb4
      • 2.Qxb4#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sxf3#
        • 2.Bxe3#
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Qxb2
        • 2.Qxe3#
      • 1...Qxc2
        • 2.Qxe3#
      • 1...Bxb4
        • 2.Sxf3#
        • 2.Bxe3#
        • 2.Qxe3#
        • 2.fxg5#
      • 1...Bxe7
        • 2.fxg5#
      • 1...Qd1
        • 2.Bxe3#
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Qe1
        • 2.Sxf3#
        • 2.Qe4#
      • 1...Qg1
        • 2.Sxf3#
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Qh1
        • 2.Bxe3#
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Rg3
        • 2.Bxe3#
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Re5
        • 2.fxe5#
      • 1...Be5
        • 2.Qc5#
      • 1...Sc5
        • 2.Sxf3#
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...Sde5
        • 2.Qa7#
      • 1...Sfe5
        • 2.Qxd6#
      • 1...f5
        • 2.Sxf3#
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...Qxd2!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe4#
      • 1...Qxb2
        • 2.Qxe3#
      • 1...Qxc2
        • 2.Qxe3#
      • 1...Bxb4
        • 2.fxg5#
      • 1...Bxe7
        • 2.fxg5#
      • 1...Re5
        • 2.fxe5#
      • 1...Be5
        • 2.Qc5#
      • 1...Sc5
        • 2.Sb5#
      • 1...Sde5
        • 2.Qa7#
      • 1...Sfe5
        • 2.Qxd6#
      • 1...f5
        • 2.Sb5#

This anticipates 29772(1947-1948)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE,P_SPINS(h),XP(E)::QAR2(J),XB(f)
  • Tries
    • Try
      • S(F);P_SPINQ(J)
      • Threat
        • DUALS(4)
      • Vars
        • Q(a);XP(B)::QAB1(J),XR(b)
        • Q(a);XP(C)::QAB1(J),XR(b)
        • B(f);N_GUARD,P_SPINS(h),XQ(J)::R(H)+P(G),XR(e)
        • R(e);OGATE::R(H)+P(G),XR(e)
        • B(f);N_PINQ(J),P_SPINS(h)::QAB1(J)
        • S(h);N_PINQ(J),P_SPINB(f)::QAB(J)
        • S(i);N_PINQ(J)::QAR2(J),XB(f)
      • Refutation
        • Q(a);XS(F)
  • Actual
    • S(F);P_SPINQ(J)
    • Threat
      • QAR1(J)
    • Vars
      • Q(a);N_GUARD,XP(B)::QAB1(J),XR(b)
      • Q(a);N_GUARD,XP(C)::QAB1(J),XR(b)
      • B(f);N_GUARD,P_SPINS(h),XP(E)::R(H)+P(G),XR(e)
      • B(f);N_GUARD,P_SPINS(h),XQ(J)::R(H)+P(G),XR(e)
      • R(e);OGATE::R(H)+P(G),XR(e)
      • B(f);N_PINQ(J),P_SPINS(h)::QAB1(J)
      • S(h);P_SPINB(f),S_CUTR(e)::S(F)
      • S(h);N_PINQ(J),P_SPINB(f)::QAB(J)
      • S(i);N_PINQ(J)::QAR2(J),XB(f)
      • P(g);S_CUTR(e)::S(F)
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).