MESON Chess Problem Database

Problem Display
PID: 227031 (8/N7/r2p2K1/3Pk3/3R4/2QPb1p1/b1PB1PP1/2q5 w - - 0 1)

Westberg, CE

Tidskrift for Schack, 1910

8/N7/r2p2K1/3Pk3/3R4/2QPb1p1/b1PB1PP1/2q5

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Sc6#
    • 1...Ra4
      • 2.Sc6#
    • 1...Ra5
      • 2.Sc6#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Bxd5
      • 2.Re4#
  • Tries
    • 1.Ra4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Rb4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Rc4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Rf4+?
      • 1...Kxf4
        • 2.Qd4#
      • 1...Bd4
        • 2.Rf5#
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Rg4+?
      • 1...Bd4
        • 2.Rg5#
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Rh4+?
      • 1...Bd4
        • 2.Rh5#
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Qc4?
      • threat
        • 2.Re4#
      • 1...Bxd4
        • 2.f4#
      • 1...Bxc4!
    • 1.Qc5?
      • threat
        • 2.Re4#
      • 1...Bxd4
        • 2.f4#
      • 1...Ra4
        • 2.Sc6#
      • 1...dxc5+!
    • 1.Qc6?
      • threat
        • 2.Re4#
      • 1...Kxd4
        • 2.Bc3#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Bxd4
        • 2.f4#
      • 1...Ra4!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Re4#
      • 1...Kxd4
        • 2.Bc3#
      • 1...Rxa5
        • 2.Sc6#
      • 1...Bxd4
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD::S(J)
    • R(f);N_GUARD::S(J),XR(f)
    • B(b);SBLOCK,XP(H)::QAB(E)+R(G),DCHECK
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(E),XB(c)
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • R(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(E),XB(c)
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • R(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(E),XB(c)
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • R(G);CHECK
      • Vars
        • K(e);P_SPINB(c),S_FLIGHT,XR(G)::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • Q(E);
      • Threat
        • R1(G)
      • Vars
        • B(c);N_GUARD,XR(G)::P(C)
      • Refutation
        • B(b);XQ(E)
    • Try
      • Q(E);
      • Threat
        • R1(G)
      • Vars
        • B(c);N_GUARD,XR(G)::P(C)
        • R(f);N_GUARD::S(J)
      • Refutation
        • P(g);CHECK,XQ(E)
    • Try
      • Q(E);
      • Threat
        • R1(G)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(G)::B(B)
        • R(f);XQ(E)::S(J),XR(f)
        • B(b);OGATE,XP(H)::QAR1(E),XB(b)
        • B(c);N_GUARD,SBLOCK,XR(G)::P(C)
      • Refutation
        • R(f);
  • Actual
    • Q(E);
    • Threat
      • R1(G)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(G)::B(B)
      • R(f);N_GUARD,XQ(E)::S(J)
      • B(c);N_GUARD,SBLOCK,XR(G)::P(C)
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