MESON Chess Problem Database

Problem Display
PID: 172127 (2B3RK/b7/8/4N2p/2Rq3k/1Q6/4n2r/8 w - - 0 1)

Apro, Laszlo

Sp. Comm., Els Escacs a Catalunya, 1933

2B3RK/b7/8/4N2p/2Rq3k/1Q6/4n2r/8

#2

6 + 6

2048 Tuxens skakopgaver (Leif C Schmidt) 1984
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Sf3#
    • 1...Qe4
      • 2.Sf3#
    • 1...Qf4
      • 2.Sf3#
    • 1...Rf2
      • 2.Qh3#
    • 1...Rg2
      • 2.Qh3#
    • 1...Rh3
      • 2.Qxh3#
    • 1...Sc1
      • 2.Qg3#
    • 1...Sg1
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sf4
      • 2.Qg3#
  • Tries
    • 1.Rxd4+?
      • 1...Sxd4
        • 2.Qg3#
      • 1...Sf4
        • 2.Sf3#
        • 2.Rxf4#
        • 2.Qg3#
      • 1...Bxd4!
    • 1.Rg7?
      • threat
        • 2.Sf3#
      • 1...Rf2
        • 2.Qh3#
      • 1...Rh3
        • 2.Qxh3#
      • 1...Sg1
        • 2.Qg3#
      • 1...Qg4!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qg5#
      • 1...Qg4
        • 2.Sg6#
      • 1...Qf4
        • 2.Sf3#
      • 1...Rg2
        • 2.Qh3#
      • 1...Sf4
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_PINS(C),N_SPINQ(c),XR(B)::S(C)
    • Q(c);N_PINS(C)::S(C)
    • R(b);N_GUARD::QAR1(A)
    • R(b);N_GUARD::QAR1(A),XR(b)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(a);N_GUARD,N_SPINQ(c)::QAB1(A)
  • Tries
    • Try
      • R(B);CHECK,N_SPINS(C),XQ(c)
      • Vars
        • S(a);XR(B)::QAB1(A)
      • Refutation
        • B(f);P_PINS(C),XR(B)
    • Try
      • R(E);N_SPINS(C)
      • Threat
        • S(C)
      • Vars
        • R(b);N_GUARD::QAR1(A)
        • R(b);N_GUARD::QAR1(A),XR(b)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • Q(c);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(c);N_PINS(C)::S(C)
      • R(b);N_GUARD::QAR1(A)
      • S(a);N_GUARD,N_SPINQ(c)::QAB1(A)
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