MESON Chess Problem Database

Problem Display
PID: 87522 (7B/4pp2/8/2p5/K1k5/5RQB/2Nn4/4n3 w - - 0 1)

Gabor, Nicholas

American Chess Problemist, 1950

7B/4pp2/8/2p5/K1k5/5RQB/2Nn4/4n3

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Se3#
    • 1...f6
      • 2.Be6#
  • Tries
    • 1.Rf4+?
      • 1...Se4
        • 2.Qb3#
      • 1...Kd5!
    • 1.Qf4+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Qh4+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Qd6?
      • threat
        • 2.Sa3#
        • 2.Se3#
        • 2.Rc3#
      • 1...Sxc2
        • 2.Rc3#
        • 2.Qd3#
      • 1...Sexf3
        • 2.Sa3#
        • 2.Se3#
      • 1...Sdxf3
        • 2.Sa3#
        • 2.Se3#
      • 1...Sg2
        • 2.Sa3#
        • 2.Rc3#
        • 2.Qd3#
      • 1...Sd3
        • 2.Sa3#
        • 2.Se3#
        • 2.Qxd3#
      • 1...Sb1
        • 2.Se3#
        • 2.Rf4#
      • 1...Sf1
        • 2.Sa3#
        • 2.Rc3#
        • 2.Rf4#
      • 1...Se4
        • 2.Sa3#
        • 2.Se3#
      • 1...e5
        • 2.Sa3#
      • 1...f6
        • 2.Sa3#
        • 2.Be6#
        • 2.Qe6#
      • 1...exd6!
    • 1.Qg4+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Kd5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Se3#
      • 1...Sxc2
        • 2.Qd3#
      • 1...fxg6
        • 2.Be6#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sf1
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...e5
        • 2.Qxf7#
      • 1...f5
        • 2.Qe6#
      • 1...f6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::S(A)
    • P(f);N_GUARD::B(D)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(b);P_SPINS(b)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(e);::S(A)
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • S(A)
    • Vars
      • K(c);S_FLIGHT::S(A)
      • S(a);N_GUARD,XS(A)::QAB1(C)
      • P(f);N_GUARD,XQ(C)::B(D)
      • S(a);N_GUARD::QAB1(C)
      • S(b);N_GUARD::QAR2(C)
      • S(b);N_GUARD::QAR2(C),XS(b)
      • P(e);N_GUARD::QAB(C),XP(f)
      • P(f);N_GUARD::QAB(C)
      • P(f);N_GUARD::B(D)
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