MESON Chess Problem Database
Problem Display
PID: 200646 (8/5p2/5K2/p5N1/R1n3Q1/2rkp1p1/2np1bN1/1B1R4 w - - 0 1)
Asplund, Per Ivan Rune
Stella Polaris, 1967
#2
7 + 10
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Qxc4#
- 1...Rb3
- 2.Qxc4#
- 1...Be1
- 2.Sxe1#
- 1...Bg1
- 2.Se1#
- 1...Sb2
- 2.Sf4#
- 2.Rd4#
- 1...Sa3
- 2.Sf4#
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 2.Rd4#
- 1...Sb6
- 2.Sf4#
- 2.Rd4#
- 1...Sd6
- 2.Sf4#
- 2.Rd4#
- 1...e2
- 2.Qe4#
- 1...Ra3
- Tries
- 1.Sh3?
- 1...Ra3
- 2.Qxc4#
- 1...Rb3
- 2.Qxc4#
- 1...Be1
- 2.Sxe1#
- 1...Bg1
- 2.Se1#
- 1...Sb2
- 2.Sgf4#
- 2.Shf4#
- 2.Rd4#
- 1...Sa3
- 2.Sgf4#
- 2.Shf4#
- 2.Rd4#
- 1...Se5
- 2.Sgf4#
- 2.Shf4#
- 2.Rd4#
- 1...Sb6
- 2.Sgf4#
- 2.Shf4#
- 2.Rd4#
- 1...Sd6
- 2.Sgf4#
- 2.Shf4#
- 2.Rd4#
- 1...e2!
- 1...Ra3
- 1.Se6?
- threat
- 2.Sc5#
- 1...Ra3
- 2.Qxc4#
- 1...Rb3
- 2.Qxc4#
- 1...Sb2
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 1...Sa3
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 1...Se5
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 1...Sb6
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 1...Sd6
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 1...e2
- 2.Qf5#
- 1...fxe6!
- threat
- 1.Sxf7?
- 1...Ra3
- 2.Qxc4#
- 1...Rb3
- 2.Qxc4#
- 1...Be1
- 2.Sxe1#
- 1...Bg1
- 2.Se1#
- 1...Sb2
- 2.Sf4#
- 2.Se5#
- 2.Rd4#
- 1...Sa3
- 2.Sf4#
- 2.Se5#
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 2.Sxe5#
- 2.Rd4#
- 1...Sb6
- 2.Sf4#
- 2.Se5#
- 2.Rd4#
- 1...Sd6
- 2.Sf4#
- 2.Se5#
- 2.Rd4#
- 1...e2!
- 1...Ra3
- 1.Sh7?
- 1...Ra3
- 2.Qxc4#
- 1...Rb3
- 2.Qxc4#
- 1...Be1
- 2.Sxe1#
- 1...Bg1
- 2.Se1#
- 1...Sb2
- 2.Sf4#
- 2.Rd4#
- 1...Sa3
- 2.Sf4#
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 2.Rd4#
- 1...Sb6
- 2.Sf4#
- 2.Rd4#
- 1...Sd6
- 2.Sf4#
- 2.Rd4#
- 1...e2!
- 1...Ra3
- 1.Rxd2+?
- 1...Sxd2
- 2.Sf4#
- 2.Rd4#
- 1...exd2
- 2.Qe4#
- 1...Kxd2!
- 1...Sxd2
- 1.Rxc4?
- threat
- 2.Rd4#
- 1...Ra3
- 2.Bxc2#
- 1...Rb3
- 2.Bxc2#
- 1...e2
- 2.Qe4#
- 1...Rxc4!
- threat
- 1.Qf5+?
- 1...Kd4
- 2.Sf3#
- 1...Ke2!
- 1...Kd4
- 1.Qd7+?
- 1...Sd6
- 2.Sf4#
- 1...Ke2!
- 1...Sd6
- 1.Sh3?
- Keys
- 1.Sf3!
- 1...Ke2
- 2.Se5#
- 1...Ra3
- 2.Qxc4#
- 1...Rb3
- 2.Qxc4#
- 1...Be1
- 2.Sfxe1#
- 1...Bg1
- 2.Sfe1#
- 1...Sb2
- 2.Sf4#
- 2.Se5#
- 1...Sa3
- 2.Sf4#
- 2.Se5#
- 1...Se5
- 2.Sf4#
- 2.Sxe5#
- 1...Sb6
- 2.Sf4#
- 2.Se5#
- 1...Sd6
- 2.Sf4#
- 2.Se5#
- 1...e2
- 2.Qf5#
- 1...Ke2
- 1.Sf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD::QAB1(E),XS(h)
- B(c);N_GUARD::S(C),XB(c)
- B(c);N_GUARD::S(C)
- P(f);::QAB1(E)
- Tries
- Try
- S(F);
- Vars
- R(d);N_GUARD::QAB1(E),XS(h)
- B(c);N_GUARD::S(C),XB(c)
- B(c);N_GUARD::S(C)
- Refutation
- P(f);
- Try
- S(F);
- Threat
- S(F)
- Vars
- R(d);N_GUARD::QAB1(E),XS(h)
- P(f);SBLOCK::QAB(E)
- Refutation
- P(j);XS(F)
- Try
- S(F);XP(j)
- Vars
- R(d);N_GUARD::QAB1(E),XS(h)
- B(c);N_GUARD::S(C),XB(c)
- B(c);N_GUARD::S(C)
- Refutation
- P(f);
- Try
- S(F);
- Vars
- R(d);N_GUARD::QAB1(E),XS(h)
- B(c);N_GUARD::S(C),XB(c)
- B(c);N_GUARD::S(C)
- Refutation
- P(f);
- Try
- R(B);CHECK,XP(b)
- Vars
- P(f);SBLOCK,XR(B)::QAB1(E)
- Refutation
- K(e);N_SPINS(a),P-FLIGHT,XR(B)
- Try
- R(D);XS(h)
- Threat
- R1(D)
- Vars
- R(d);N_GUARD::B(A),XS(a)
- P(f);::QAB1(E)
- Refutation
- R(d);XR(D)
- Try
- Q(E);CHECK
- Vars
- K(e);N_SPINS(a),P-FLIGHT,P_SPINS(h)::S(F)
- Refutation
- K(e);N_SPINP(b),N_SPINS(a),S_FLIGHT
- Try
- Q(E);CHECK
- Vars
- S(h);::S(C)
- Refutation
- K(e);N_SPINP(b),N_SPINS(a),S_FLIGHT
- Try
- Actual
- S(F);
- Vars
- K(e);N_SPINP(b),N_SPINS(a),S_FLIGHT::QAB(E)+S(F)
- R(d);N_GUARD::QAB1(E),XS(h)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- P(f);SBLOCK::QAB(E)
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).