MESON Chess Problem Database

Problem Display
PID: 78251 (2Q4K/8/p5b1/1p6/B2n4/r2k4/1BR1RP2/4rn2 w - - 0 1)

Burger, Robert Eugene

The Problemist Supplement, 2007

2Q4K/8/p5b1/1p6/B2n4/r2k4/1BR1RP2/4rn2

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc3#
    • 1...Ra2
      • 2.Qc3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Rxa4
      • 2.Qc3#
    • 1...Sd2
      • 2.Rcxd2#
    • 1...Sh2
      • 2.Rcd2#
    • 1...Sg3
      • 2.Rcd2#
    • 1...Sxc2
      • 2.Qxc2#
    • 1...Sb3
      • 2.Qc3#
    • 1...bxa4
      • 2.Qc4#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Bxb5+?
      • 1...Sxb5
        • 2.Qc4#
      • 1...axb5!
    • 1.Qc5?
      • threat
        • 2.Qxd4#
      • 1...Rxa4
        • 2.Qc3#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Sd2
        • 2.Rcxd2#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Sb3
        • 2.Qc3#
      • 1...Sf3
        • 2.Qxa3#
      • 1...Sf5
        • 2.Qxa3#
      • 1...Sc6
        • 2.Qxa3#
      • 1...Se6
        • 2.Qxa3#
      • 1...Sxe2!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxd4#
      • 1...Rxa4
        • 2.Rc3#
      • 1...Sxc2
        • 2.Bxc2#
      • 1...Sxe2
        • 2.Qxg6#
      • 1...Rc3
        • 2.Rxc3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sd2
        • 2.Rexd2#
      • 1...Sb3
        • 2.Rc3#
        • 2.Qxg6#
      • 1...Sf3
        • 2.Qxg6#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sc6
        • 2.Qxg6#
      • 1...Se6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::QAR1(F)
    • R(c);N_GUARD::QAR1(F),XR(c)
    • R(c);N_GUARD,XB(E)::QAR1(F)
    • S(b);N_GUARD::R1(B),XS(b)
    • S(b);N_GUARD::R1(B)
    • S(e);OGATE,XR(B)::QAB1(F),XS(e)
    • S(e);S_CUTR(c)::QAR1(F)
    • P(f);N_GUARD,XB(E)::QAB1(F)
    • P(f);N_GUARD::QAB1(F)
  • Tries
    • Try
      • B(E);CHECK,XP(f)
      • Vars
        • S(e);XB(E)::QAB1(F)
      • Refutation
        • P(g);XB(E)
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XS(e)
      • Vars
        • R(c);N_GUARD,XB(E)::QAR1(F)
        • S(e);OGATE,XR(B)::QAB1(F),XS(e)
        • S(b);N_GUARD::R1(B),XS(b)
        • R(c);N_GUARD::QAR1(F),XR(c)
        • S(e);S_CUTR(c)::QAR1(F)
        • S(e);N_GUARD::QAR(F),XR(c)
      • Refutation
        • S(e);XR(C)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F),XS(e)
    • Vars
      • R(c);N_GUARD,XB(E)::R1(B)
      • S(e);OGATE,XR(B)::B(E),XS(e)
      • S(e);N_GUARD,XR(C)::QAB(F),XB(h)
      • R(c);N_GUARD::R1(B),XR(c)
      • B(h);N_GUARD::QAB1(F),XB(h)
      • S(b);N_GUARD::R1(C),XS(b)
      • S(e);N_GUARD::QAB(F),XB(h)
      • S(e);S_CUTB(h)::QAB1(F)
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