MESON Chess Problem Database

Problem Display
PID: 52430 (r3k3/2bqr3/N2p3n/8/B6B/1Q3R2/8/2R4K w q - 0 1)

Holladay, Edgar Dinwiddie

American Chess Bulletin, 1957

r3k3/2bqr3/N2p3n/8/B6B/1Q3R2/8/2R4K

#2

7 + 7

5064 100 Years of the American Two-move Chess Problem 1962
6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Re1+
      • 2.Rxe1#
    • 1...Re2
      • 2.Sxc7#
    • 1...Re3
      • 2.Sxc7#
      • 2.Qxe3#
    • 1...Re4
      • 2.Sxc7#
    • 1...Re5
      • 2.Sxc7#
    • 1...Re6
      • 2.Sxc7#
      • 2.Qxe6#
    • 1...Rg7
      • 2.Sxc7#
    • 1...Rh7
      • 2.Sxc7#
    • 1...Rd8
      • 2.Sxc7#
    • 1...Bb8
      • 2.Rc8#
    • 1...Sg4
      • 2.Qg8#
    • 1...Sf5
      • 2.Qg8#
    • 1...Sg8
      • 2.Qxg8#
    • 1...0-0-0
      • 2.Qb8#
  • Tries
    • 1.Qb8+?
      • 1...Bxb8
        • 2.Rc8#
      • 1...Bd8
        • 2.Sc7#
      • 1...Rxb8!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...0-0-0
        • 2.Rxc7#
      • 1...Rxe6
        • 2.Sxc7#
      • 1...Sf5
        • 2.Qg8#
      • 1...Bd8
        • 2.Bxd7#
      • 1...Sg8
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(e);CHECK,OGATEB::R(A),XR(e)
    • R(e);::S(G),XB(c)
    • R(f);SBLOCK::S(G),XB(c)
    • B(c);OGATE::R(A)
    • S(b);N_GUARD::QAR2(C)
    • S(b);N_GUARD::QAR2(C),XS(b)
    • K(g);0-0-0,N_SPINQ(d),P_SPINB(c)::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(c);OGATE,XQ(C)::R(A)
        • B(c);P_SPINB(c)::S(G)
      • Refutation
        • R(f);XQ(C)
  • Actual
    • Q(C);P_PINR(e)
    • Threat
      • QAR1(C),XR(e)
    • Vars
      • K(g);N_SPINQ(d),P-FLIGHT::QAR1(C),XQ(d)
      • K(g);0-0-0,N_SPINR(e),OGATEB,P_SPINB(c)::R1(A),XB(c)
      • R(e);N_SPINR(e),XQ(C)::S(G),XB(c)
      • S(b);N_GUARD::QAR2(C)
      • B(c);SBLOCK::B(E),XQ(d)
      • S(b);N_GUARD::QAR2(C),XS(b)
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