MESON Chess Problem Database
Problem Display
PID: 75720 (8/8/2Np4/2p3n1/2Q2p1K/2P2kN1/3r2p1/6B1 w - - 0 1)
Arnstam, Knut Anders Olof
1st Prize, Vart Hem, 1941
#2
6 + 7
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Qe2#
- 1...Ra2
- 2.Qd3#
- 1...Rb2
- 2.Qd3#
- 1...Rc2
- 2.Qd3#
- 1...Re2
- 2.Qxe2#
- 1...Rf2
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qe2#
- 1...Rd5
- 2.Qe2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...fxg3
- 2.Qg4#
- 1...d5
- 2.Se5#
- 1...Rd1
- Tries
- 1.Sd4+?
- 1...Rxd4
- 2.Qe2#
- 1...cxd4!
- 1...Rxd4
- 1.Sa5?
- 1...fxg3
- 2.Qg4#
- 1...Rf2
- 2.Qd3#
- 1...Rd1
- 2.Qe2#
- 1...Ra2
- 2.Qd3#
- 1...Rb2
- 2.Qd3#
- 1...Rc2
- 2.Qd3#
- 1...Re2
- 2.Qxe2#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qe2#
- 1...Rd5
- 2.Qe2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...d5!
- 1...fxg3
- 1.Sa7?
- 1...fxg3
- 2.Qg4#
- 1...Rf2
- 2.Qd3#
- 1...Rd1
- 2.Qe2#
- 1...Ra2
- 2.Qd3#
- 1...Rb2
- 2.Qd3#
- 1...Rc2
- 2.Qd3#
- 1...Re2
- 2.Qxe2#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qe2#
- 1...Rd5
- 2.Qe2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...d5!
- 1...fxg3
- 1.Se7?
- 1...fxg3
- 2.Qg4#
- 1...Rf2
- 2.Qd3#
- 1...Rd1
- 2.Qe2#
- 1...Ra2
- 2.Qd3#
- 1...Rb2
- 2.Qd3#
- 1...Rc2
- 2.Qd3#
- 1...Re2
- 2.Qxe2#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qe2#
- 1...Rd5
- 2.Qe2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...d5!
- 1...fxg3
- 1.Sb8?
- 1...fxg3
- 2.Qg4#
- 1...Rf2
- 2.Qd3#
- 1...Rd1
- 2.Qe2#
- 1...Ra2
- 2.Qd3#
- 1...Rb2
- 2.Qd3#
- 1...Rc2
- 2.Qd3#
- 1...Re2
- 2.Qxe2#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qe2#
- 1...Rd5
- 2.Qe2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...d5!
- 1...fxg3
- 1.Sd8?
- 1...fxg3
- 2.Qg4#
- 1...Rf2
- 2.Qd3#
- 1...Rd1
- 2.Qe2#
- 1...Ra2
- 2.Qd3#
- 1...Rb2
- 2.Qd3#
- 1...Rc2
- 2.Qd3#
- 1...Re2
- 2.Qxe2#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qe2#
- 1...Rd5
- 2.Qe2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...d5!
- 1...fxg3
- 1.Qd5+?
- 1...Se4
- 2.Qxe4#
- 2.Qh5#
- 1...Rxd5!
- 1...Se4
- 1.Sd4+?
- Keys
- 1.Qxc5!
- 1...fxg3
- 2.Qe3#
- 1...dxc5
- 2.Se5#
- 1...d5
- 2.Se5#
- 1...Rd1
- 2.Qf2#
- 1...Ra2
- 2.Sd4#
- 1...Rb2
- 2.Sd4#
- 1...Rc2
- 2.Sd4#
- 1...Re2
- 2.Sd4#
- 1...Rf2
- 2.Qxf2#
- 1...Rd3
- 2.Qf2#
- 1...Rd4
- 2.Sxd4#
- 1...Rd5
- 2.Qf2#
- 1...Sh3
- 2.Qh5#
- 1...Se4
- 2.Qh5#
- 1...Se6
- 2.Qh5#
- 1...Sf7
- 2.Qh5#
- 1...Sh7
- 2.Qh5#
- 1...fxg3
- 1.Qxc5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 15
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD::QAR2(D)
- R(a);N_GUARD::QAB1(D),XR(a)
- R(a);N_GUARD::QAR2(D),XR(a)
- S(f);N_GUARD::QAB1(D)
- S(f);N_GUARD::QAB1(D),XS(f)
- P(d);OGATE,XS(C)::QAB1(D)
- P(g);N_GUARD::S(F)
- Tries
- Try
- S(F);CHECK
- Vars
- R(a);XS(F)::QAB1(D)
- Refutation
- P(e);XS(F)
- Try
- S(F);
- Vars
- P(d);OGATE,XS(C)::QAB1(D)
- R(a);N_GUARD::QAR2(D)
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD::QAB1(D),XR(a)
- R(a);N_GUARD::QAR2(D),XR(a)
- S(f);N_GUARD::QAB1(D)
- S(f);N_GUARD::QAB1(D),XS(f)
- Refutation
- P(g);
- Try
- S(F);
- Vars
- P(d);OGATE,XS(C)::QAB1(D)
- R(a);N_GUARD::QAR2(D)
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD::QAB1(D),XR(a)
- R(a);N_GUARD::QAR2(D),XR(a)
- S(f);N_GUARD::QAB1(D)
- S(f);N_GUARD::QAB1(D),XS(f)
- Refutation
- P(g);
- Try
- S(F);
- Vars
- P(d);OGATE,XS(C)::QAB1(D)
- R(a);N_GUARD::QAR2(D)
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD::QAB1(D),XR(a)
- R(a);N_GUARD::QAR2(D),XR(a)
- S(f);N_GUARD::QAB1(D)
- S(f);N_GUARD::QAB1(D),XS(f)
- Refutation
- P(g);
- Try
- S(F);
- Vars
- P(d);OGATE,XS(C)::QAB1(D)
- R(a);N_GUARD::QAR2(D)
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD::QAB1(D),XR(a)
- R(a);N_GUARD::QAR2(D),XR(a)
- S(f);N_GUARD::QAB1(D)
- S(f);N_GUARD::QAB1(D),XS(f)
- Refutation
- P(g);
- Try
- S(F);
- Vars
- P(d);OGATE,XS(C)::QAB1(D)
- R(a);N_GUARD::QAR2(D)
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD::QAB1(D),XR(a)
- R(a);N_GUARD::QAR2(D),XR(a)
- S(f);N_GUARD::QAB1(D)
- S(f);N_GUARD::QAB1(D),XS(f)
- Refutation
- P(g);
- Try
- Q(D);CHECK
- Refutation
- R(a);XQ(D)
- Try
- Actual
- Q(D);XP(e)
- Vars
- P(d);N_GUARD,XS(C)::QAR1(D)
- P(g);N_GUARD,XQ(D)::S(F)
- P(g);N_GUARD::S(F)
- R(a);N_GUARD::QAR1(D)
- R(a);N_GUARD::S(F)
- R(a);N_GUARD::QAR1(D),XR(a)
- R(a);N_GUARD::S(F),XR(a)
- S(f);OGATE::QAB(D)
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).