MESON Chess Problem Database

Problem Display
PID: 2910 (2n5/3b4/1p3p2/1p3N1P/1K2k3/2P1p2p/Q3B2B/8 w - - 0 1)

Lindquist, Carl Emil Richard

Source?, 1907

2n5/3b4/1p3p2/1p3N1P/1K2k3/2P1p2p/Q3B2B/8

#2

7 + 8

2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qd5#
    • 1...Bxf5
      • 2.Qa8#
    • 1...Bc6
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Be8
      • 2.Qe6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sa7
      • 2.Sd6#
    • 1...Se7
      • 2.Sd6#
  • Tries
    • 1.Se7?
      • threat
        • 2.Qb1#
        • 2.Qd5#
        • 2.Qc2#
      • 1...Bc6
        • 2.Qb1#
        • 2.Qe6#
        • 2.Qc2#
      • 1...Be6
        • 2.Qb1#
        • 2.Qxe6#
        • 2.Qc2#
      • 1...Sxe7!
    • 1.Bd3+?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Bf3+?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kxf5
        • 2.Qd5#
      • 1...Kxf3!
    • 1.Bg3?
      • 1...Kxf5
        • 2.Qd5#
      • 1...Bxf5
        • 2.Qa8#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Bc6
        • 2.Qe6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Be8
        • 2.Qe6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...h2!
    • 1.Bd6?
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qd5#
      • 1...Bxf5
        • 2.Qa8#
      • 1...Sxd6!
    • 1.Bc7?
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qd5#
      • 1...Bxf5
        • 2.Qa8#
      • 1...Sd6!
    • 1.Bb8?
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qd5#
      • 1...Bxf5
        • 2.Qa8#
      • 1...Sd6!
    • 1.Qb3?
      • 1...Kxf5
        • 2.Qd5#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Bc6
        • 2.Qe6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Be8
        • 2.Qe6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Bxf5!
    • 1.Qc4+?
      • 1...Kxf5
        • 2.Qd5#
        • 2.Qg4#
      • 1...bxc4!
    • 1.Qg8?
      • 1...Kxf5
        • 2.Bd3#
        • 2.Qd5#
        • 2.Qg4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Bc6
        • 2.Qe6#
      • 1...Be8
        • 2.Qe6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Bxf5!
    • 1.Qd2?
      • threat
        • 2.Qd3#
      • 1...Kxf5
        • 2.Qd5#
      • 1...exd2!
    • 1.Qa8+?
      • 1...Kxf5
        • 2.Qd5#
      • 1...Bc6!
    • 1.h6?
      • 1...Bxf5
        • 2.Qa8#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Bc6
        • 2.Qe6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Be8
        • 2.Qe6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Kxf5!
  • Keys
    • 1.Qf7!
      • 1...Kxf5
        • 2.Qd5#
      • 1...Bxf5
        • 2.Qb7#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Bc6
        • 2.Qe6#
      • 1...Be8
        • 2.Qe6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XS(F)::QAR2(A)
    • B(g);N_GUARD,SBLOCK,XS(F)::QAB(A)
    • B(g);N_GUARD::QAR2(A)
    • B(g);N_GUARD::QAR2(A),XB(g)
    • S(h);N_GUARD::S(F),XS(h)
    • S(h);N_GUARD::S(F)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(3)
      • Refutation
        • S(h);XS(F)
    • Try
      • B(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT,XB(B)
    • Try
      • B(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT,XB(B)
    • Try
      • B(C);
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
        • B(g);N_GUARD,SBLOCK,XS(F)::QAB(A)
        • S(h);N_GUARD::S(F),XS(h)
        • B(g);N_GUARD::QAR2(A)
        • B(g);N_GUARD::QAR2(A),XB(g)
        • S(h);N_GUARD::S(F)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
        • B(g);N_GUARD,SBLOCK,XS(F)::QAB(A)
      • Refutation
        • S(h);XB(C)
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
        • B(g);N_GUARD,SBLOCK,XS(F)::QAB(A)
      • Refutation
        • S(h);
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
        • B(g);N_GUARD,SBLOCK,XS(F)::QAB(A)
      • Refutation
        • S(h);
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
        • S(h);N_GUARD::S(F),XS(h)
        • B(g);N_GUARD::QAR2(A)
        • B(g);N_GUARD::QAR2(A),XB(g)
        • S(h);N_GUARD::S(F)
      • Refutation
        • B(g);XS(F)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);
      • Vars
        • B(g);N_GUARD::QAR2(A),XB(g)
        • S(h);N_GUARD::S(F),XS(h)
        • B(g);N_GUARD::QAR2(A)
        • S(h);N_GUARD::S(F)
      • Refutation
        • B(g);XS(F)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAR2(A)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • P(G);
      • Vars
        • B(g);N_GUARD,SBLOCK,XS(F)::QAB(A)
        • S(h);N_GUARD::S(F),XS(h)
        • B(g);N_GUARD::QAR2(A)
        • B(g);N_GUARD::QAR2(A),XB(g)
        • S(h);N_GUARD::S(F)
      • Refutation
        • K(c);S_FLIGHT,XS(F)
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINP(f),S_FLIGHT,XS(F)::QAR2(A)
      • B(g);OGATE,SBLOCK,XS(F)::QAB(A)
      • B(g);N_GUARD::QAR2(A),XB(g)
      • S(h);N_GUARD::S(F),XS(h)
      • B(g);N_GUARD::QAR2(A)
      • S(h);N_GUARD::S(F)
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