MESON Chess Problem Database

Problem Display
PID: 350 (BBr4b/3Q1P1K/4R3/1p1rn2R/4k1p1/3n1p1P/b1N1p2q/1N6 w - - 0 1)

Anderson, Gerald Frank

The Observer, 1929

BBr4b/3Q1P1K/4R3/1p1rn2R/4k1p1/3n1p1P/b1N1p2q/1N6

#2

10 + 12

5383 A Tribute to G F Anderson 1974

SOLUTION

  • SOUND
  • Tries
    • 1.Rexe5+?
      • 1...Kf4
        • 2.Qxg4#
      • 1...Bxe5
        • 2.Qf5#
      • 1...Sxe5
        • 2.Qf5#
      • 1...Qxe5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qf5#
      • 1...Kf4
        • 2.Qxg4#
      • 1...Rxd7
        • 2.Rc4#
      • 1...Sxc6
        • 2.Sd2#
      • 1...Sxd7
        • 2.Sd2#
      • 1...Sxf7
        • 2.Sd2#
      • 1...Rd6
        • 2.Rc4#
      • 1...Qf4
        • 2.Sc3#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Rc5
        • 2.Qd4#
      • 1...Sc4
        • 2.Qxd5#
      • 1...Sg6
        • 2.Sd2#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK,XS(j)
      • Vars
        • K(f);N_SPINR(i),P-FLIGHT::QAR1(F),XP(g)
        • B(l);XR(E)::QAB1(F)
        • S(d);XR(E)::QAB1(F)
      • Refutation
        • Q(c);XR(E)
  • Actual
    • R(E);N_PINR(i),N_PINS(j)
    • Threat
      • QAB1(F)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(j)::QAR1(F),XP(g)
      • R(i);P_PINP(G),XQ(F)::B(I)+R(E),DCHECK
      • S(j);XR(E)::S(A)
      • S(j);XQ(F)::S(A)
      • S(j);XP(G)::S(A)
      • R(i);::B(I)+R(E),DCHECK
      • Q(c);SBLOCK::S(A)
      • R(i);OGATE::QAR1(F),XR(i)
      • R(i);OGATE::QAR1(F)
      • S(j);S_CUTB(a)::QAB1(F),XR(i)
      • S(j);::S(A)
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