MESON Chess Problem Database

Problem Display
PID: 223207 (r3R3/1Qn5/1p6/3pB3/3Pk1P1/5p1K/2N5/3Rn3 w - - 0 1)

Bettmann, Edgar

Bettmann, Henry Wald

1st Prize, Southern Trade Gazette, 1886

r3R3/1Qn5/1p6/3pB3/3Pk1P1/5p1K/2N5/3Rn3

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bxc7#
    • 1...Ra2
      • 2.Bxc7#
    • 1...Ra3
      • 2.Bxc7#
    • 1...Ra4
      • 2.Bxc7#
    • 1...Ra5
      • 2.Bxc7#
    • 1...Ra6
      • 2.Bxc7#
    • 1...Ra7
      • 2.Bxc7#
    • 1...Sb5
      • 2.Bb8#
      • 2.Qh7#
    • 1...Sa6
      • 2.Bb8#
      • 2.Qh7#
    • 1...Se6
      • 2.Qh7#
    • 1...Sxe8
      • 2.Qh7#
  • Tries
    • 1.Bh2+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qh7#
      • 1...Sxe8
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxe8!
    • 1.Bg3+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qh7#
      • 1...Sxe8
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxe8!
    • 1.Bd6+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qh7#
      • 1...Sxe8
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxe8!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Rxe1#
      • 1...Rxa6
        • 2.Bxc7#
      • 1...Sxc2
        • 2.Qd3#
      • 1...Sxa6
        • 2.Bb8#
      • 1...f2
        • 2.Qe2#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sb5
        • 2.Bb8#
      • 1...b5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • R(g);N_GUARD::R(H)+B(F),XS(f)
    • S(f);OGATE::QAB(G)
    • S(f);OGATE,XR(H)::QAB(G)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • R(g);XR(H)
    • Try
      • B(F);CHECK
      • Refutation
        • R(g);XR(H)
    • Try
      • B(F);CHECK
      • Refutation
        • R(g);XR(H)
  • Actual
    • Q(G);N_PINP(d)
    • Threat
      • R(A),XS(a)
    • Vars
      • R(g);N_GUARD,XQ(G)::R(H)+B(F),XS(f)
      • S(a);N_GUARD,XS(B)::QAB1(G)
      • S(f);OGATE,XQ(G)::R(H)+B(F)
      • P(b);N_GUARD::QAR2(G)
      • S(a);N_GUARD::QAB1(G)
      • S(a);N_GUARD::QAB1(G),XS(a)
      • S(f);OGATE::R(H)+B(F)
      • P(e);OGATE::QAB(G)
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