MESON Chess Problem Database

Problem Display
PID: 101237 (8/p2p4/1P1k1K2/2p2P2/3P4/q7/p1Q3B1/8 w - - 0 1)

Soby, TS

Good Companions, 1920

8/p2p4/1P1k1K2/2p2P2/3P4/q7/p1Q3B1/8

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.dxc5#
    • 1...Qb2
      • 2.Qxc5#
    • 1...Qb3
      • 2.Qxc5#
      • 2.dxc5#
    • 1...Qd3
      • 2.Qxc5#
      • 2.dxc5#
    • 1...Qe3
      • 2.Qxc5#
    • 1...Qf3
      • 2.Qxc5#
    • 1...Qg3
      • 2.Qxc5#
      • 2.dxc5#
    • 1...Qh3
      • 2.Qxc5#
      • 2.dxc5#
    • 1...Qa4
      • 2.Qxc5#
      • 2.dxc5#
    • 1...Qa6
      • 2.Qxc5#
      • 2.dxc5#
    • 1...cxd4
      • 2.Qc7#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qd5#
      • 1...axb6
        • 2.Qxb6#
      • 1...c4
        • 2.Qxa3#
      • 1...Qxb3!
    • 1.Qe4?
      • threat
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qe7#
      • 1...cxd4
        • 2.Qd5#
        • 2.Qxd4#
        • 2.Qe5#
        • 2.Qe7#
      • 1...axb6
        • 2.Qf4#
        • 2.Qe5#
      • 1...Qc1
        • 2.Qd5#
        • 2.Qe5#
        • 2.Qe7#
      • 1...Qb3
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qe7#
      • 1...Qe3
        • 2.Qd5#
      • 1...Qg3
        • 2.Qd5#
        • 2.Qe7#
      • 1...Qf3!
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...cxd4
        • 2.Qxa3#
        • 2.Qc7#
      • 1...Qf3
        • 2.Qxc5#
      • 1...Qe3
        • 2.Qxc5#
      • 1...Qg3
        • 2.Qxc5#
        • 2.dxc5#
      • 1...Qxc1!
    • 1.Qc4?
      • threat
        • 2.Qd5#
      • 1...Qf3
        • 2.Qxc5#
      • 1...Qb3
        • 2.Qxc5#
        • 2.dxc5#
      • 1...axb6!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Qh2#
      • 1...Qxf3
        • 2.Qxc5#
      • 1...cxd4
        • 2.Qc7#
      • 1...Qc1
        • 2.dxc5#
      • 1...Qb2
        • 2.Qxc5#
      • 1...Qe3
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::P(C),XP(c)
    • Q(b);N_GUARD,P_PINP(C)::QAB1(A),XP(c)
    • Q(b);N_GUARD::QAB1(A),XP(c)
    • Q(b);N_GUARD,P_PINP(D)::QAB1(A),XP(c)
    • P(c);OGATE,XP(C)::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);OGATE,XP(E)::QAR2(A),XP(e)
        • P(c);OGATEB::QAB(A),XQ(b)
      • Refutation
        • Q(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Vars
        • Q(b);::QAR1(A)
      • Refutation
        • Q(b);P_PINP(D)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(b);N_GUARD,P_PINP(D)::QAB1(A),XP(c)
        • Q(b);N_GUARD::QAB1(A),XP(c)
      • Refutation
        • Q(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(b);N_GUARD,P_PINP(D)::QAB1(A),XP(c)
      • Refutation
        • P(e);XP(E)
  • Actual
    • B(B);
    • Threat
      • QAB(A)
    • Vars
      • Q(b);N_GUARD,P_PINP(D),XB(B)::QAB1(A),XP(c)
      • P(c);OGATE,XP(C)::QAB1(A)
      • Q(b);N_GUARD::P(C),XP(c)
      • Q(b);N_GUARD,P_PINP(C)::QAB1(A),XP(c)
      • Q(b);N_GUARD::QAB1(A),XP(c)
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