MESON Chess Problem Database

Problem Display
PID: 161712 (1b3rQ1/4NR2/3p1n2/5q2/RB1P1k1P/Kp1pr3/5P1N/8 w - - 0 1)

Thomas, Georg

Nationaltidende, 1940

(First published on Sun Apr 28 1940)

1b3rQ1/4NR2/3p1n2/5q2/RB1P1k1P/Kp1pr3/5P1N/8

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qg4#
      • 2.Qg5#
    • 1...Qg4
      • 2.Qxg4#
    • 1...Qh7
      • 2.Qg4#
    • 1...Qa5
      • 2.Qg4#
    • 1...Qb5
      • 2.Qg4#
    • 1...Qc5
      • 2.Qg4#
    • 1...Qd5
      • 2.Qg4#
    • 1...Qe5
      • 2.Qg4#
    • 1...Re4
      • 2.Qg3#
    • 1...Se4
      • 2.Sd5#
      • 2.Sg6#
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sd5
      • 2.Qg4#
    • 1...Sh5
      • 2.Qg4#
    • 1...Sd7
      • 2.Qg4#
    • 1...Sh7
      • 2.Qg4#
    • 1...Se8
      • 2.Qg4#
  • Tries
    • 1.Sd5+?
      • 1...Qxd5
        • 2.Qg4#
      • 1...Sxd5
        • 2.Qg4#
      • 1...Ke4!
    • 1.Qg3+?
      • 1...Ke4
        • 2.Qxe3#
      • 1...Rxg3!
    • 1.Qg5+?
      • 1...Ke4
        • 2.Qxe3#
      • 1...Qxg5!
  • Keys
    • 1.d5!
      • threat
        • 2.Bxd6#
      • 1...Ke4
        • 2.Bc3#
        • 2.Bxd6#
      • 1...Ke5
        • 2.Bc3#
      • 1...Qe4
        • 2.Qg5#
      • 1...Qe5
        • 2.Qg4#
      • 1...Re4
        • 2.Qg3#
      • 1...Re5
        • 2.Bd2#
      • 1...Se4
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(e);N_GUARD,P_SPINS(g)::QAR1(J),XQ(e)
    • Q(e);N_GUARD,P_SPINS(g)::QAR1(J)
    • Q(e);N_GUARD,P_PINR(D),P_SPINS(g)::QAR1(J)
    • Q(e);N_GUARD,P_PINB(E),P_SPINS(g)::QAR1(J)
    • R(c);N_GUARD,SBLOCK::QAB1(J)
    • S(g);N_GUARD,P_SPINQ(e)::QAR1(J),XS(g)
    • S(g);N_GUARD,P_SPINQ(e)::QAR1(J)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(e);P_SPINS(g),XS(H)::QAR1(J)
        • S(g);P_SPINQ(e),XS(H)::QAR1(J)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(J),XR(c)
      • Refutation
        • R(c);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT::QAR1(J),XR(c)
      • Refutation
        • Q(e);P_SPINS(g),XQ(J)
  • Actual
    • P(F);
    • Threat
      • R(D)+B(E),DCHECK,XP(f)
    • Vars
      • K(d);S_FLIGHT::B(E)
      • Q(e);N_GUARD,P_SPINS(g),SBLOCK::QAB1(J)
      • Q(e);N_GUARD,P_SPINS(g),SBLOCK::QAR1(J)
      • R(c);N_GUARD,SBLOCK::QAB1(J)
      • R(c);SBLOCK::R(D)+B(E),DCHECK
      • S(g);P_SPINQ(e),SBLOCK::S(H)
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