MESON Chess Problem Database

Problem Display
PID: 120116 (k7/2Qn2B1/1P6/r7/8/p7/8/K7 w - - 0 1)

Drnek, Josef

Nove parizske mody, 1906

k7/2Qn2B1/1P6/r7/8/p7/8/K7

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qa7#
    • 1...Rc5
      • 2.Qa7#
    • 1...Rd5
      • 2.Qa7#
    • 1...Re5
      • 2.Qa7#
    • 1...Rf5
      • 2.Qa7#
    • 1...Rg5
      • 2.Qa7#
    • 1...Rh5
      • 2.Qa7#
    • 1...Ra7
      • 2.Qxa7#
    • 1...Sc5
      • 2.Qc8#
    • 1...Se5
      • 2.Qc8#
    • 1...Sf6
      • 2.Qc8#
    • 1...Sf8
      • 2.Qc8#
  • Tries
    • 1.Bd4?
      • threat
        • 2.b7#
      • 1...Rb5
        • 2.Qa7#
      • 1...Rc5
        • 2.Qa7#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Sc5
        • 2.Qc8#
      • 1...Sxb6!
    • 1.Qxd7?
      • threat
        • 2.Qc8#
      • 1...Rc5
        • 2.Qa7#
      • 1...Kb8!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qc6#
      • 1...Rxe5
        • 2.Qa7#
      • 1...Sxe5
        • 2.Qc8#
      • 1...Sxb6
        • 2.Qb8#
      • 1...Rc5
        • 2.Qa7#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Sc5
        • 2.Qb8#
        • 2.Qc8#
      • 1...Sb8
        • 2.Qxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::QAR1(C)
    • R(b);N_GUARD::QAR1(C),XR(b)
    • S(c);N_GUARD::QAR2(C)
  • Tries
    • Try
      • B(D);
      • Threat
        • P(B)
      • Vars
        • R(b);N_GUARD::QAR1(C)
        • R(b);N_GUARD::QAR1(C),XR(b)
        • S(c);N_GUARD::QAR2(C)
      • Refutation
        • S(c);XP(B)
    • Try
      • Q(C);XS(c)
      • Threat
        • QAR2(C)
      • Vars
        • R(b);N_GUARD::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAB(C)
    • Vars
      • R(b);N_GUARD,XB(D)::QAR1(C)
      • S(c);N_GUARD,XB(D)::QAR2(C)
      • S(c);N_GUARD,XP(B)::QAR1(C)
      • R(b);N_GUARD::QAR1(C)
      • R(b);N_GUARD::QAR1(C),XR(b)
      • S(c);N_GUARD::QAR1(C),XS(c)
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