MESON Chess Problem Database

Problem Display
PID: 10004 (1B6/5p2/2pnN1P1/R1N1k3/4p3/8/5Q2/7K w - - 0 1)

Mortensen, Jan Robert (aka 'Adamas')

Rudenko, Valentin Fedorovich

1st Prize, Moscow Congress, 1961

1B6/5p2/2pnN1P1/R1N1k3/4p3/8/5Q2/7K

#2

7 + 5

3749 FIDE Album (1959-1961) 1966
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd4#
    • 1...fxe6
      • 2.Sd3#
      • 2.Sd7#
    • 1...f5
      • 2.Qd4#
  • Tries
    • 1.Bxd6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Qg3+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kd5!
    • 1.Qb2+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf6!
    • 1.gxf7?
      • 1...Kd5
        • 2.Qd4#
      • 1...e3!
  • Keys
    • 1.Qe3!
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf6
        • 2.Qg5#
      • 1...fxe6
        • 2.Sd7#
      • 1...fxg6
        • 2.Qg5#
      • 1...f5
        • 2.Qd4#
      • 1...f6
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINS(d),P-FLIGHT::QAR1(B)
    • P(e);SBLOCK::QAB1(B)
  • Tries
    • Try
      • B(G);CHECK,XS(d)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XB(G)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINS(d),P-FLIGHT::QAR1(B)
        • K(b);N_SPINS(d),S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);N_SPINS(d),P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINS(d),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINS(d),P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINS(d),OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINS(d),S_FLIGHT,XQ(B)
    • Try
      • P(F);XP(e)
      • Vars
        • K(b);N_SPINS(d),P-FLIGHT::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • Q(B);P_PINP(a)
    • Vars
      • K(b);N_SPINP(a),N_SPINS(d),P-FLIGHT::QAR1(B)
      • K(b);N_SPINP(a),N_SPINS(d),S_FLIGHT::QAB1(B)
      • P(e);SBLOCK,XS(E)::R(C)+S(D),DCHECK
      • P(e);N_GUARD,XP(F)::QAR2(B)
      • P(e);SBLOCK::QAB1(B)
      • P(e);SBLOCK::QAR1(B),XP(a)
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