MESON Chess Problem Database

Problem Display
PID: 164516 (2R5/8/4p3/4p1NQ/n1Bk2p1/1p2p1pb/1N4p1/K1R3B1 w - - 0 1)

Dugas, Eugene Albert

The Problemist, 1980

2R5/8/4p3/4p1NQ/n1Bk2p1/1p2p1pb/1N4p1/K1R3B1

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Sxe6#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Bxe3#
      • 1...e4
        • 2.Sxe6#
      • 1...b2+!
    • 1.Sxa4?
      • threat
        • 2.Rd1#
        • 2.Rd8#
      • 1...e4
        • 2.Sxe6#
      • 1...b2+!
    • 1.Sf7?
      • threat
        • 2.Qxe5#
      • 1...e4
        • 2.Rd8#
        • 2.Qe5#
      • 1...Ke4!
    • 1.Qxg4+?
      • 1...e4
        • 2.Sf3#
        • 2.Qxe4#
      • 1...Bxg4!
    • 1.Qg6?
      • threat
        • 2.Sxe6#
        • 2.Qd3#
        • 2.Qe4#
      • 1...Sxb2
        • 2.Sxe6#
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Sc3
        • 2.Sxe6#
        • 2.Qd3#
      • 1...Sc5!
    • 1.Qh7?
      • threat
        • 2.Sxe6#
        • 2.Qd3#
        • 2.Qe4#
        • 2.Qd7#
      • 1...Sxb2
        • 2.Sxe6#
        • 2.Qe4#
        • 2.Qa7#
        • 2.Qd7#
      • 1...e4
        • 2.Qxe4#
      • 1...Sc3
        • 2.Sxe6#
        • 2.Qd3#
        • 2.Qa7#
      • 1...Sb6
        • 2.Sxe6#
        • 2.Qd3#
        • 2.Qe4#
      • 1...Sc5!
  • Keys
    • 1.Bxe6!
      • threat
        • 2.Rd1#
        • 2.R1c4#
        • 2.R8c4#
        • 2.Rd8#
      • 1...Sxb2
        • 2.Rd8#
      • 1...e4
        • 2.Qh8#
      • 1...Sc3
        • 2.Rc4#
      • 1...Sc5
        • 2.Rc4#
      • 1...Sb6
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(i);SBLOCK::S(F),XP(j)
  • Tries
    • Try
      • S(D);
      • Threat
        • B(C),XP(c)
      • Vars
        • P(i);SBLOCK::S(F),XP(j)
      • Refutation
        • P(b);CHECK
    • Try
      • S(D);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(i);SBLOCK::S(F),XP(j)
      • Refutation
        • P(b);CHECK
    • Try
      • S(F);
      • Threat
        • QAB1(G),XP(i)
      • Refutation
        • K(g);N_SPINP(c),P-FLIGHT
    • Try
      • Q(G);CHECK,XP(h)
      • Refutation
        • B(e);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • P(i);::QAR1(G),XP(i)
      • Refutation
        • S(f);
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Vars
        • P(i);::QAR1(G),XP(i)
      • Refutation
        • S(f);
  • Actual
    • B(E);XP(j)
    • Threat
      • DUALS(4)
    • Vars
      • S(f);XS(D)::R(H)
      • P(i);OGATEB::QAB(G)
      • S(f);::R1(H)
      • S(f);::R1(B)
      • S(f);::R(B)
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