MESON Chess Problem Database

Problem Display
PID: 276626 (8/4p1N1/p3P1K1/R3PPNp/4pk1r/2p2n1p/2pn1Q1P/2B5 w - - 0 1)

Fjellstrom, Zakarias

Stella Polaris, 1970

8/4p1N1/p3P1K1/R3PPNp/4pk1r/2p2n1p/2pn1Q1P/2B5

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Qg3#
    • 1...Rg4
      • 2.Sxh5#
    • 1...e3
      • 2.Qg3#
  • Tries
    • 1.Kf7?
      • 1...Kg4
        • 2.Qg3#
      • 1...Rg4
        • 2.Sxh3#
      • 1...e3
        • 2.Qg3#
      • 1...Kxg5!
    • 1.Kh7?
      • 1...Kg4
        • 2.Qg3#
      • 1...Rg4
        • 2.Sxh3#
      • 1...e3
        • 2.Qg3#
      • 1...Kxg5!
    • 1.Sxf3?
      • 1...Rg4+
        • 2.Sg5#
      • 1...Kg4
        • 2.Qg3#
      • 1...exf3
        • 2.Qd4#
      • 1...e3!
    • 1.Sxh3+?
      • 1...Kg4
        • 2.Qg3#
        • 2.Qg2#
      • 1...Rxh3!
    • 1.Sxh5+?
      • 1...Kg4
        • 2.Qg3#
      • 1...Rxh5!
    • 1.Se8?
      • 1...Kg4
        • 2.Qg3#
      • 1...e3
        • 2.Qg3#
      • 1...Rg4!
    • 1.Bxd2+?
      • 1...Kg4
        • 2.Qg3#
      • 1...e3
        • 2.Qg3#
        • 2.Qxf3#
      • 1...cxd2!
    • 1.Ra4?
      • threat
        • 2.Rxe4#
      • 1...Kg4
        • 2.Qg3#
      • 1...Kxe5!
    • 1.Rc5?
      • 1...Kg4
        • 2.Qg3#
      • 1...Rg4
        • 2.Sxh5#
      • 1...e3
        • 2.Qg3#
      • 1...a5!
    • 1.Rd5?
      • 1...Kg4
        • 2.Qg3#
      • 1...Rg4
        • 2.Sxh5#
      • 1...e3
        • 2.Qg3#
      • 1...a5!
    • 1.f6?
      • 1...Kg4
        • 2.Qg3#
      • 1...Rg4
        • 2.Sxh5#
      • 1...e3
        • 2.Qg3#
      • 1...exf6!
  • Keys
    • 1.Kh6!
      • 1...Kg4
        • 2.Qg3#
      • 1...Rg4
        • 2.Sxh3#
      • 1...e3
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
    • R(h);N_GUARD,P_PINS(G),SBLOCK::S(J),XP(i)
    • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • R(h);N_GUARD,SBLOCK::S(G),XP(e)
        • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
      • Refutation
        • K(g);S_FLIGHT,XS(G)
    • Try
      • K(I);S_FLIGHT
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • R(h);N_GUARD,SBLOCK::S(G),XP(e)
        • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
      • Refutation
        • K(g);S_FLIGHT,XS(G)
    • Try
      • S(G);XS(d)
      • Vars
        • R(h);CHECK,SBLOCK::QAR(B)+S(G)
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • P(f);OGATEB,P_SPINP(f),SBLOCK,XS(G)::QAR2(B)
      • Refutation
        • P(f);N_SPINS(b)
    • Try
      • S(G);CHECK,XP(e)
      • Refutation
        • R(h);XS(G)
    • Try
      • S(J);CHECK,XP(i)
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
      • Refutation
        • R(h);XS(J)
    • Try
      • S(J);
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
      • Refutation
        • R(h);P_PINS(G)
    • Try
      • B(A);CHECK,P_PINS(d),XS(b)
      • Vars
        • K(g);N_SPINS(d),P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);XB(A)
    • Try
      • R(D);P_PINP(f)
      • Threat
        • R1(D),XP(f)
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(g);N_SPINP(f),N_SPINS(b),S_FLIGHT,XP(E)
    • Try
      • R(D);
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • R(h);N_GUARD,P_PINS(G),SBLOCK::S(J),XP(i)
        • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
      • Refutation
        • P(j);
    • Try
      • R(D);
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • R(h);N_GUARD,P_PINS(G),SBLOCK::S(J),XP(i)
        • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
      • Refutation
        • P(j);
    • Try
      • P(F);
      • Vars
        • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
        • R(h);N_GUARD,P_PINS(G),SBLOCK::S(J),XP(i)
        • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
      • Refutation
        • P(k);XP(F)
  • Actual
    • K(I);P-FLIGHT
    • Vars
      • K(g);N_GUARD,N_SPINS(b),P-FLIGHT::QAR1(B)
      • R(h);N_GUARD,SBLOCK::S(G),XP(e)
      • P(f);N_SPINS(b),P_SPINS(d),SBLOCK::QAB1(B)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).