MESON Chess Problem Database

Problem Display
PID: 196907 (8/5N1n/2p5/bpNk4/8/PP2P3/8/2Q4K w - - 0 1)

Villaret, Albert

Deutsches Wochenschach, 1919

8/5N1n/2p5/bpNk4/8/PP2P3/8/2Q4K

#2

7 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc5
        • 2.Qd4#
      • 1...Bc7
        • 2.Qd4#
      • 1...Bc3!
    • 1.Qd2+?
      • 1...Kxc5
        • 2.Qd4#
      • 1...Bxd2!
    • 1.Qa1?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc5
        • 2.Qd4#
      • 1...Bc7
        • 2.Qd4#
      • 1...Bc3!
    • 1.Qd1+?
      • 1...Kxc5
        • 2.Qd4#
      • 1...Bd2!
    • 1.Qc3?
      • threat
        • 2.Qd4#
        • 2.Qe5#
        • 2.e4#
      • 1...Bc7
        • 2.Qd4#
        • 2.e4#
      • 1...Sg5
        • 2.Qd4#
        • 2.Qe5#
      • 1...Sf6
        • 2.Qd4#
        • 2.Qe5#
      • 1...Bxc3!
  • Keys
    • 1.Qg1!
      • threat
        • 2.e4#
      • 1...Kxc5
        • 2.e4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sf6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,XS(F)::QAB1(A)
        • B(a);::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::QAB1(A)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,XS(F)::QAB1(A)
        • B(a);::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::QAB1(A)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • P(E)
    • Vars
      • K(c);P-FLIGHT,XS(F)::QAB(A)+P(E)
      • S(e);N_GUARD::QAR(A),XS(e)
      • S(e);N_GUARD::QAR(A)
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