MESON Chess Problem Database

Problem Display
PID: 174194 (r4n2/4Q3/Np1N4/k2P4/8/1P1p4/3K4/8 w - - 0 1)

Buchner, Richard

Promadas, 1930

r4n2/4Q3/Np1N4/k2P4/8/1P1p4/3K4/8

#2

6 + 5

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4+?
      • 1...Kb5
        • 2.Sc7#
      • 1...Kxa6!
    • 1.Sb7+?
      • 1...Kb5
        • 2.Sc7#
      • 1...Kxa6!
    • 1.Qh4?
      • threat
        • 2.Qa4#
      • 1...Kxa6
        • 2.Qa4#
      • 1...b5!
    • 1.Qe1?
      • threat
        • 2.Qa1#
      • 1...Kxa6
        • 2.Qa1#
      • 1...Rxa6
        • 2.Kxd3#
      • 1...b5!
    • 1.Qe4?
      • threat
        • 2.Qa4#
      • 1...Kxa6
        • 2.Qa4#
      • 1...b5!
    • 1.Qe5?
      • threat
        • 2.Qa1#
      • 1...Kxa6
        • 2.Qa1#
      • 1...Rxa6
        • 2.Qc3#
      • 1...b5!
    • 1.Qd7?
      • threat
        • 2.Qa4#
        • 2.Qb5#
      • 1...Kxa6
        • 2.Qa4#
      • 1...b5
        • 2.Qxb5#
      • 1...Sxd7!
    • 1.Qg7?
      • threat
        • 2.Qa1#
      • 1...Kxa6
        • 2.Qa1#
      • 1...Rxa6
        • 2.Qc3#
      • 1...b5!
    • 1.b4+?
      • 1...Kxa6
        • 2.Qb7#
      • 1...Ka4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qa1#
      • 1...Kxa6
        • 2.Qa1#
      • 1...Rxa6
        • 2.Qc3#
      • 1...b5
        • 2.Sb7#

Anticipated by 100765(1912)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::S(D)
      • Refutation
        • K(b);P-FLIGHT,XS(D)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::S(D)
      • Refutation
        • K(b);P-FLIGHT,XS(D)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR2(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR(F)
        • R(d);SBLOCK,XS(D)::QAB(F)+K(A),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR2(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR(F)
        • R(d);SBLOCK,XS(D)::QAB(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR2(F)
        • P(c);::QAR1(F),XP(c)
      • Refutation
        • S(e);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR(F)
        • R(d);SBLOCK,XS(D)::QAB(F)
      • Refutation
        • P(c);
    • Try
      • P(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • K(b);P-FLIGHT,XS(D)::QAR(F)
      • R(d);SBLOCK,XS(D)::QAB(F)
      • P(c);SBLOCK::S(E)
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