MESON Chess Problem Database

Problem Display
PID: 136311 (1N1k4/K3pB1p/b2qQ3/1p6/6p1/3R4/2R5/3r4 w - - 0 1)

Burger, Robert Eugene

1st Prize, Chess Life, 1953-1954

1N1k4/K3pB1p/b2qQ3/1p6/6p1/3R4/2R5/3r4

#2

6 + 8

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Qb6#
    • 1...Qd4+
      • 2.Qb6#
    • 1...Qd5
      • 2.Qxd5#
      • 2.Qb6#
    • 1...Qd7+
      • 2.Qxd7#
    • 1...Bc8
      • 2.Rxc8#
      • 2.Qxc8#
  • Tries
    • 1.Sxa6?
      • threat
        • 2.Rc8#
        • 2.Qc8#
      • 1...Qd7+
        • 2.Qxd7#
      • 1...Rc1
        • 2.Qc8#
      • 1...Qd4+!
    • 1.Bh5?
      • threat
        • 2.Qg8#
      • 1...Qd4+
        • 2.Qb6#
      • 1...Qd7+
        • 2.Qxd7#
      • 1...Rf1!
    • 1.Bg6?
      • threat
        • 2.Qg8#
      • 1...Qd4+
        • 2.Qb6#
      • 1...Qd7+
        • 2.Qxd7#
      • 1...Rf1!
    • 1.Rxd6+?
      • 1...exd6
        • 2.Qd7#
        • 2.Qf6#
        • 2.Qe8#
      • 1...Rxd6!
    • 1.Qxg4?
      • threat
        • 2.Qg8#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qd7+
        • 2.Qxd7#
      • 1...e5
        • 2.Qh4#
        • 2.Qg5#
      • 1...e6
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rg1!
    • 1.Qh6?
      • threat
        • 2.Qf8#
      • 1...Qd4+
        • 2.Qb6#
      • 1...Qd7+!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qh8#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qd7+
        • 2.Qc7#
      • 1...e6
        • 2.Qxd6#
        • 2.Qf6#
        • 2.Qg5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_SPINQ(e),OGATE,XR(B)::QAB(C)
    • Q(e);CHECK,OGATE::QAB(C)
    • Q(e);CHECK,N_GUARD::QAR1(C),XQ(e)
  • Tries
    • Try
      • S(F);XB(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,N_GUARD::QAR1(C),XQ(e)
        • R(a);::QAR1(C)
      • Refutation
        • Q(e);CHECK
    • Try
      • B(E);
      • Threat
        • QAR(C)
      • Vars
        • Q(e);CHECK,OGATE::QAB(C)
        • Q(e);CHECK,N_GUARD::QAR1(C),XQ(e)
      • Refutation
        • R(a);
    • Try
      • B(E);
      • Threat
        • QAR(C)
      • Vars
        • Q(e);CHECK,OGATE::QAB(C)
        • Q(e);CHECK,N_GUARD::QAR1(C),XQ(e)
      • Refutation
        • R(a);
    • Try
      • R(B);CHECK,XQ(e)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(C);XP(b)
      • Threat
        • QAR(C)
      • Vars
        • Q(e);CHECK,OGATEB::QAR(C),XQ(e)
        • Q(e);CHECK,N_GUARD::QAR1(C),XQ(e)
      • Refutation
        • R(a);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • Q(e);CHECK,OGATE::QAB(C)
      • Refutation
        • Q(e);CHECK
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • Q(e);CHECK,OGATEB::QAR(C),XQ(e)
      • Q(e);CHECK,OGATE::QAB1(C)
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