MESON Chess Problem Database

Problem Display
PID: 204367 (8/Kbp5/1R3Q2/k2B1N1R/4p3/1P5r/2p2b2/2q5 w - - 0 1)

Manskopf, Johannes Karl Alvin Georg

Die Schwalbe, 1925

8/Kbp5/1R3Q2/k2B1N1R/4p3/1P5r/2p2b2/2q5

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Qa1#
    • 1...Qe3
      • 2.Qa1#
    • 1...Qf4
      • 2.Qa1#
    • 1...Qg5
      • 2.Qa1#
    • 1...Qh6
      • 2.Qa1#
    • 1...Qa1
      • 2.Qxa1#
    • 1...Rh1
      • 2.Qc3#
    • 1...Rh2
      • 2.Qc3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Rh4
      • 2.Qc3#
    • 1...Rxh5
      • 2.Qc3#
    • 1...Be3
      • 2.Qc3#
    • 1...Bg3
      • 2.Qc3#
    • 1...e3
      • 2.Qc3#
  • Tries
    • 1.Qa1+?
      • 1...Qa3
        • 2.Qxa3#
      • 1...Qxa1!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc4#
        • 2.Qc3#
      • 1...Qxe3
        • 2.Qa1#
      • 1...Rxe3
        • 2.Bc6#
      • 1...Bxe3
        • 2.Qc3#
      • 1...cxb6
        • 2.Qxb6#
      • 1...Qb2
        • 2.Sc4#
      • 1...Qd2
        • 2.Sc4#
        • 2.Qa1#
      • 1...Qa3
        • 2.Sc4#
      • 1...Qa1
        • 2.Sc4#
        • 2.Qxa1#
      • 1...Qe1
        • 2.Sc4#
      • 1...Qf1
        • 2.Qc3#
      • 1...Be1
        • 2.Sc4#
      • 1...Ba6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::QAR(F)
    • Q(a);N_GUARD::QAR(F),XQ(a)
    • R(d);N_GUARD::QAB(F)
    • R(d);N_GUARD::QAB(F),XR(d)
    • R(d);N_GUARD,SBLOCK,XR(D)::QAB(F)
    • B(c);S_CUTR(d)::QAB(F)
    • B(c);N_PINR(E),S_CUTR(d)::QAB(F)
    • P(e);N_PINR(E),S_CUTR(d)::QAB(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR2(F),XQ(a)
      • Refutation
        • Q(a);XQ(F)
  • Actual
    • S(C);N_SPINR(E)
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);N_GUARD,P_PINR(E),XS(C)::QAR(F)
      • R(d);N_GUARD,XS(C)::R(D)+B(B)
      • B(c);P_PINR(E),XS(C)::QAB(F)
      • P(h);OGATE,XR(E)::QAB1(F),XP(h)
      • Q(a);::S(C)
      • Q(a);::QAB(F)
      • B(c);::S(C)
      • B(g);::QAB(F)
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