MESON Chess Problem Database

Problem Display
PID: 112423 (1QN5/8/r2P4/2k2K2/8/1Bp5/2N1P3/4B3 w - - 0 1)

Shinkman, William Anthony

St. John Globe, 1888

1QN5/8/r2P4/2k2K2/8/1Bp5/2N1P3/4B3

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb6#
    • 1...Ra2
      • 2.Qb6#
    • 1...Ra3
      • 2.Qb6#
    • 1...Ra4
      • 2.Qb6#
    • 1...Ra5
      • 2.Qb6#
    • 1...Rb6
      • 2.Qxb6#
    • 1...Rc6
      • 2.Bf2#
      • 2.Qb4#
    • 1...Ra7
      • 2.Qb6#
    • 1...Ra8
      • 2.Qb6#
  • Tries
    • 1.Sa3?
      • 1...Kd4
        • 2.Bf2#
      • 1...Kc6
        • 2.Qc7#
        • 2.Qb5#
      • 1...Rxa3
        • 2.Qb6#
      • 1...Rxd6
        • 2.Qxd6#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Ra4
        • 2.Qb6#
      • 1...Ra5
        • 2.Qb6#
      • 1...Rc6
        • 2.Bf2#
      • 1...Ra7
        • 2.Qb6#
      • 1...Ra8
        • 2.Qb6#
      • 1...c2!
    • 1.Sb4?
      • threat
        • 2.Bf2#
      • 1...Kd4
        • 2.Bf2#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rxd6!
    • 1.Sa7?
      • threat
        • 2.Bf2#
        • 2.Qb4#
      • 1...Rxd6
        • 2.Qb4#
        • 2.Qb5#
      • 1...Ra4
        • 2.Qc7#
      • 1...Rb6
        • 2.Bf2#
      • 1...Rxa7!
    • 1.Qc7+?
      • 1...Rc6
        • 2.Qa5#
      • 1...Kb5!
    • 1.Qb7?
      • threat
        • 2.Bf2#
        • 2.Qd5#
      • 1...Rb6
        • 2.Qd5#
        • 2.Qxb6#
      • 1...Ra4
        • 2.Qd5#
        • 2.Qb6#
      • 1...Rc6
        • 2.Bf2#
        • 2.Qb4#
      • 1...Rxd6!
  • Keys
    • 1.Sd4!
      • 1...Kxd4
        • 2.Bf2#
      • 1...Rxd6
        • 2.Qxd6#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Ra1
        • 2.Qb6#
      • 1...Ra2
        • 2.Qb6#
      • 1...Ra3
        • 2.Qb6#
      • 1...Ra4
        • 2.Qb6#
      • 1...Ra5
        • 2.Qb6#
      • 1...Rc6
        • 2.Se6#
      • 1...Ra7
        • 2.Qb6#
      • 1...Ra8
        • 2.Qb6#
      • 1...c2
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAB1(G)
    • R(c);N_GUARD::QAB1(G),XR(c)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);S_FLIGHT::B(A)
        • R(c);N_GUARD,XS(B)::QAB1(G)
        • R(c);OGATE,XP(F)::QAB1(G),XR(c)
        • R(c);N_GUARD::QAB1(G),XR(c)
        • R(c);N_GUARD::QAB1(G)
        • R(c);SBLOCK::B(A)
      • Refutation
        • P(a);
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • K(b);S_FLIGHT::B(A)
        • R(c);N_GUARD::QAB1(G),XR(c)
      • Refutation
        • R(c);XP(F)
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD::QAR2(G)
        • R(c);::B(A)
      • Refutation
        • R(c);XS(H)
    • Try
      • Q(G);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c),SBLOCK::QAR2(G)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • R(c);XP(F)
  • Actual
    • S(B);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(B)::B(A)
      • R(c);OGATE,XP(F)::QAB1(G),XR(c)
      • R(c);N_GUARD::QAB1(G),XR(c)
      • R(c);N_GUARD::QAB1(G)
      • R(c);SBLOCK::S(B)
      • P(a);::QAB1(G)
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