MESON Chess Problem Database

Problem Display
PID: 233375 (3R4/7p/2ppPQpP/2P5/1P1bkNP1/1PB1p1PK/2n1B3/8 w - - 0 1)

Wright, Roger John

Pen & Pencil, 1889

(First published on Sat Oct 12 1889)

3R4/7p/2ppPQpP/2P5/1P1bkNP1/1PB1p1PK/2n1B3/8

#2

13 + 8

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxd4#
    • 1...Se1
      • 2.Qxd4#
    • 1...Sa3
      • 2.Qxd4#
    • 1...Sxb4
      • 2.Qxd4#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Bd3#
        • 2.Bf3#
      • 1...Sxb4
        • 2.Bf3#
        • 2.Qxd4#
      • 1...Se1+!
    • 1.Sh5?
      • 1...Kd5
        • 2.Bf3#
      • 1...Bxc5
        • 2.Qf3#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Sxb4
        • 2.Qxd4#
      • 1...dxc5
        • 2.Qf4#
      • 1...gxh5
        • 2.Qf5#
      • 1...Be5
        • 2.Qf3#
      • 1...Sa1
        • 2.Qxd4#
      • 1...Se1
        • 2.Qxd4#
      • 1...Sa3
        • 2.Qxd4#
      • 1...d5
        • 2.Qf4#
      • 1...g5
        • 2.Qf5#
      • 1...Bxc3!
    • 1.Qxg6+?
      • 1...Ke5
        • 2.Qf5#
      • 1...hxg6!
  • Keys
    • 1.Sd5!
      • 1...Kxd5
        • 2.Bf3#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...Bxc5
        • 2.Qf3#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Sxb4
        • 2.Qxd4#
      • 1...cxd5
        • 2.Qf4#
      • 1...dxc5
        • 2.Qf4#
      • 1...Be5
        • 2.Qf3#
      • 1...Sa1
        • 2.Qxd4#
      • 1...Se1
        • 2.Qxd4#
      • 1...Sa3
        • 2.Qxd4#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(K),XB(c)
    • S(a);N_GUARD,XP(F)::QAR1(K),XB(c)
    • P(g);N_GUARD::QAB1(K)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);CHECK
    • Try
      • S(G);
      • Vars
        • K(d);P_SPINP(f),S_FLIGHT::B(A)
        • B(c);XP(I)::QAB1(K)
        • B(c);XQ(K)::S(G),XB(c)
        • S(a);N_GUARD,XP(F)::QAR1(K),XB(c)
        • P(f);XP(I)::QAR1(K)
        • P(g);N_GUARD,XS(G)::QAB1(K)
        • B(c);::QAB1(K)
        • S(a);N_GUARD::QAR1(K),XB(c)
        • P(f);::QAR1(K)
        • P(g);N_GUARD::QAB1(K)
      • Refutation
        • B(c);XB(C)
    • Try
      • Q(K);CHECK,XP(g)
      • Vars
        • K(d);P-FLIGHT,P_SPINB(c)::QAR1(K)
      • Refutation
        • P(h);XQ(K)
  • Actual
    • S(G);
    • Vars
      • K(d);P_SPINP(f),S_FLIGHT,XS(G)::B(A)
      • B(c);XB(C)::S(G),XB(c)
      • B(c);XP(I)::QAB1(K)
      • B(c);XQ(K)::S(G),XB(c)
      • S(a);N_GUARD,XP(F)::QAR1(K),XB(c)
      • P(e);SBLOCK,XS(G)::QAR1(K)
      • P(f);XP(I)::QAR1(K)
      • B(c);::QAB1(K)
      • S(a);N_GUARD::QAR1(K),XB(c)
      • P(g);N_GUARD::QAB1(K)
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