MESON Chess Problem Database

Problem Display
PID: 93127 (8/1Q6/1p3pp1/2pN2p1/2Pk4/N3R1P1/8/4K2b w - - 0 1)

Modin, Carl Edvin

Tidskrift for Schack, 1909

8/1Q6/1p3pp1/2pN2p1/2Pk4/N3R1P1/8/4K2b

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qg7#
  • Tries
    • 1.Sxb6?
      • threat
        • 2.Sc2#
      • 1...Be4
        • 2.Qxe4#
      • 1...Kxe3!
    • 1.Qa6?
      • threat
        • 2.Sc2#
      • 1...b5
        • 2.Qxf6#
      • 1...Be4!
    • 1.Qc6?
      • threat
        • 2.Qxf6#
      • 1...f5
        • 2.Qf6#
      • 1...Bxd5!
    • 1.Qxb6?
      • threat
        • 2.Qb2#
        • 2.Qxf6#
      • 1...f5
        • 2.Qb2#
        • 2.Qf6#
      • 1...Bxd5!
    • 1.Qe7?
      • threat
        • 2.Qxf6#
      • 1...f5
        • 2.Qf6#
        • 2.Qe5#
        • 2.Qg7#
      • 1...Bxd5!
    • 1.Qf7?
      • threat
        • 2.Qxf6#
      • 1...f5
        • 2.Qf6#
        • 2.Qg7#
      • 1...Bxd5!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sbc2#
      • 1...Kxe3
        • 2.Sac2#
      • 1...cxb4
        • 2.Qxb6#
      • 1...Be4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATEB::QAB(G)
  • Tries
    • Try
      • S(F);XP(e)
      • Threat
        • S(B)
      • Vars
        • B(a);N_GUARD::QAR1(G),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(G);
      • Threat
        • S(B)
      • Vars
        • P(e);OGATE::QAB(G),XP(f)
      • Refutation
        • B(a);
    • Try
      • Q(G);
      • Threat
        • QAB(G),XP(f)
      • Vars
        • P(f);::QAB(G)
      • Refutation
        • B(a);XS(F)
    • Try
      • Q(G);P_PINP(c),XP(e)
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);XS(F)
    • Try
      • Q(G);
      • Threat
        • QAB(G),XP(f)
      • Refutation
        • B(a);XS(F)
    • Try
      • Q(G);
      • Threat
        • QAB(G),XP(f)
      • Refutation
        • B(a);XS(F)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(b);S_FLIGHT,XR(C)::S(B)
      • P(c);OGATEB,XS(F)::QAB(G),XP(e)
      • B(a);N_GUARD::QAR1(G),XB(a)
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