MESON Chess Problem Database

Problem Display
PID: 16865 (1n1KQ3/4BN1B/r1p2R1P/3kN2R/8/1n2P1b1/6r1/8 w - - 0 1)

Holladay, Edgar Dinwiddie

2nd HM., American Chess Bulletin, 1944

1n1KQ3/4BN1B/r1p2R1P/3kN2R/8/1n2P1b1/6r1/8

#2

10 + 7

5088 How to Solve Chess Problems 1945
5064 100 Years of the American Two-move Chess Problem 1962
6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.e4#
    • 1...Sc5
      • 2.Rd6#
    • 1...Sd7
      • 2.Qxd7#
  • Tries
    • 1.Sh8?
      • threat
        • 2.Qf7#
        • 2.Qg8#
      • 1...Bxe5
        • 2.Qf7#
      • 1...Be1
        • 2.Qf7#
      • 1...Bf2
        • 2.Qf7#
      • 1...Bh2
        • 2.Qf7#
      • 1...Bf4
        • 2.Qf7#
      • 1...Bh4
        • 2.Qf7#
      • 1...Sd4
        • 2.e4#
      • 1...Sc5
        • 2.Rd6#
      • 1...c5!
    • 1.Bb4?
      • threat
        • 2.Rd6#
        • 2.Qe6#
      • 1...Bxe5
        • 2.Qe6#
      • 1...Bh4
        • 2.Qe6#
      • 1...Sd4
        • 2.Rd6#
        • 2.e4#
      • 1...Sc5
        • 2.Rd6#
      • 1...c5!
    • 1.Bd6?
      • threat
        • 2.Qe6#
      • 1...Sd4
        • 2.e4#
      • 1...Sc5!
    • 1.Bf8?
      • threat
        • 2.Qe6#
      • 1...Sd4
        • 2.e4#
      • 1...Sc5
        • 2.Rd6#
      • 1...c5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Sh8#
      • 1...Bxe5
        • 2.Sg5#
      • 1...Be1
        • 2.Qxg2#
      • 1...Bf2
        • 2.Qxg2#
      • 1...Bh2
        • 2.Qxg2#
      • 1...Bf4
        • 2.Qxg2#
      • 1...Bh4
        • 2.Qxg2#
      • 1...Sd4
        • 2.e4#
      • 1...Sc5
        • 2.Rd6#
      • 1...c5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::P(A)
    • S(b);SBLOCK::R1(D)
    • S(g);N_GUARD::QAR2(J),XS(g)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);P_SPINB(c),XS(B)::QAB(J)
        • B(c);::QAB(J)
        • S(b);SBLOCK::P(A)
        • S(b);SBLOCK::R1(D)
      • Refutation
        • P(f);
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);P_SPINB(c),XS(B)::QAB1(J)
        • B(c);P_PINR(D)::QAB1(J)
        • S(b);::R1(D)
      • Refutation
        • P(f);
    • Try
      • B(F);
      • Threat
        • QAB1(J)
      • Vars
        • S(b);SBLOCK::P(A)
      • Refutation
        • S(b);
    • Try
      • B(F);
      • Threat
        • QAB1(J)
      • Vars
        • S(b);SBLOCK::P(A)
        • S(b);SBLOCK::R1(D)
      • Refutation
        • P(f);
  • Actual
    • Q(J);
    • Threat
      • QAB(J)+S(G)
    • Vars
      • B(c);P_SPINB(c),SBLOCK,XS(B)::QAB(J)+S(G)
      • B(c);OGATE::QAB(J),XR(a)
      • S(b);SBLOCK::P(A)
      • S(b);SBLOCK::R1(D)
      • P(f);SBLOCK::QAB(J)+S(G)
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