MESON Chess Problem Database

Problem Display
PID: 16737 (1B6/4pnK1/2p2Nb1/4nkp1/R1N3p1/8/8/3QR3 w - - 0 1)

Thomas, Georg

3rd Prize, Skakbladet, 1942

1B6/4pnK1/2p2Nb1/4nkp1/R1N3p1/8/8/3QR3

#2

7 + 8

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxg4#
    • 1...Ke6
      • 2.Qd7#
    • 1...Sd3
      • 2.Qxg4#
      • 2.Qxd3#
    • 1...Sf3
      • 2.Qc2#
      • 2.Qb1#
      • 2.Qd3#
    • 1...Sxc4
      • 2.Qc2#
      • 2.Qxg4#
      • 2.Qb1#
      • 2.Qd3#
    • 1...Sd7
      • 2.Qc2#
      • 2.Qxg4#
      • 2.Qb1#
      • 2.Qd3#
    • 1...e6
      • 2.Se3#
  • Tries
    • 1.Rxe5+?
      • 1...Kf4
        • 2.Qxg4#
      • 1...Sxe5!
    • 1.Qc2+?
      • 1...Kf4
        • 2.Qf2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Ke6!
    • 1.Qd3+?
      • 1...Kf4
        • 2.Rf1#
      • 1...Ke6
        • 2.Qd7#
      • 1...Sxd3!
    • 1.Qd7+?
      • 1...Kf4
        • 2.Qxg4#
      • 1...e6
        • 2.Se3#
      • 1...Sxd7!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Se3#
      • 1...Kf4
        • 2.Rf1#
      • 1...Ke6
        • 2.Sd6#
      • 1...Sxc4
        • 2.Qc2#
        • 2.Qb1#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT,P_SPINS(b)::QAR1(A),XP(a)
    • K(c);P_SPINS(b),S_FLIGHT::QAB1(A)
    • P(g);SBLOCK::S(D)
  • Tries
    • Try
      • R(B);CHECK,XS(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(A),XP(a)
      • Refutation
        • S(h);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR2(A)
        • S(b);N_GUARD,P_SPINS(b)::QAB(A),XS(b)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R(B)
        • K(c);P_SPINS(b),S_FLIGHT::QAB1(A)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,P_SPINS(b)::QAR1(A),XP(a)
        • P(g);P_SPINP(g)::S(D)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • S(D)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::R(B)
      • K(c);P_SPINS(b),S_FLIGHT::QAB(A)+S(D)
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