MESON Chess Problem Database
Problem Display
PID: 72759 (8/3p4/1p1B4/1R1N4/2pkp3/N7/3b2p1/1B1Q1nK1 w - - 0 1)
Larsen, Karl Adolf Koefoed
Match: Denmark - Netherlands, 1946
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...c3
- 2.Qa4#
- 1...e3
- 2.Qg4#
- 1...Sh2
- Tries
- 1.Kxg2?
- 1...Sh2
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...c3
- 2.Qa4#
- 1...e3
- 2.Qg4#
- 1...Se3+!
- 1...Sh2
- 1.Sc3?
- 1...Kxc3
- 2.Be5#
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Se2#
- 2.Be5#
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Se2#
- 2.Be5#
- 1...Ke3!
- 1...Kxc3
- 1.Se3?
- 1...Kc3
- 2.Be5#
- 1...Sxe3
- 2.Be5#
- 2.Qxd2#
- 1...Sh2
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...c3
- 2.Sf5#
- 1...Kxe3!
- 1...Kc3
- 1.Sb4?
- 1...Kc3
- 2.Be5#
- 1...Ke3
- 2.Sac2#
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Be5#
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Be5#
- 1...c3!
- 1...Kc3
- 1.Sf4?
- 1...Kc3
- 2.Se2#
- 2.Be5#
- 1...Ke3
- 2.Sc2#
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Se2#
- 2.Be5#
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Se2#
- 2.Be5#
- 1...c3!
- 1...Kc3
- 1.Bc2?
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Qg4#
- 1...c3!
- 1...Sh2
- 1.Bb4?
- threat
- 2.Bc3#
- 1...c3
- 2.Bxc3#
- 1...Ke5!
- threat
- 1.Bc7?
- 1...c3
- 2.Qa4#
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Qg4#
- 1...d6!
- 1...c3
- 1.Bb8?
- 1...c3
- 2.Qa4#
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Qg4#
- 1...d6!
- 1...c3
- 1.Rc5?
- threat
- 2.Sb5#
- 1...b5
- 2.Sxb5#
- 1...bxc5!
- threat
- 1.Qc2?
- threat
- 2.Qxe4#
- 2.Qxc4#
- 1...c3
- 2.Qa4#
- 2.Qxe4#
- 1...Bc3
- 2.Qxe4#
- 2.Qxc3#
- 1...Se3
- 2.Qxe4#
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 2.Qxc4#
- 1...e3
- 2.Qe4#
- 2.Qxc4#
- 1...Be3+!
- threat
- 1.Qe2?
- threat
- 2.Sc2#
- 2.Qxc4#
- 2.Qxe4#
- 1...c3
- 2.Sc2#
- 2.Qc4#
- 2.Qxe4#
- 1...Se3
- 2.Qxd2#
- 1...Sg3
- 2.Sc2#
- 2.Qxc4#
- 2.Qxd2#
- 1...e3
- 2.Qxc4#
- 2.Qg4#
- 1...Be3+!
- threat
- 1.Kxg2?
- Keys
- 1.Se7!
- 1...Kc3
- 2.Be5#
- 1...Ke3
- 2.Sf5#
- 1...c3
- 2.Sf5#
- 1...Sh2
- 2.Qxd2#
- 1...Se3
- 2.Be5#
- 2.Qxd2#
- 1...Sg3
- 2.Qxd2#
- 1...e3
- 2.Be5#
- 1...Kc3
- 1.Se7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- S(a);N_GUARD::QAR2(B),XB(b)
- P(d);OGATEB::QAR(B)
- P(f);OGATEB::QAR(B)
- Tries
- Try
- K(C);P-FLIGHT,XP(c)
- Vars
- S(a);N_GUARD::QAR2(B),XB(b)
- P(d);OGATEB::QAR(B)
- P(f);OGATEB::QAR(B)
- Refutation
- S(a);CHECK
- Try
- S(F);
- Vars
- K(e);N_SPINB(b),S_FLIGHT,XS(F)::B(G)
- S(a);N_GUARD::QAR2(B),XB(b)
- Refutation
- K(e);N_SPINB(b),S_FLIGHT
- Try
- S(F);
- Vars
- K(e);N_SPINB(b),S_FLIGHT::B(G)
- S(a);N_GUARD::QAR2(B),XB(b)
- P(d);SBLOCK::S(F)
- Refutation
- K(e);N_SPINB(b),S_FLIGHT,XS(F)
- Try
- S(F);
- Vars
- K(e);N_SPINB(b),S_FLIGHT::B(G)
- K(e);N_SPINB(b),S_FLIGHT::S(D)
- S(a);N_GUARD::QAR2(B),XB(b)
- P(f);SBLOCK::B(G)
- Refutation
- P(d);
- Try
- S(F);
- Vars
- K(e);N_SPINB(b),S_FLIGHT::S(D)
- S(a);N_GUARD::QAR2(B),XB(b)
- Refutation
- P(d);
- Try
- B(A);
- Vars
- S(a);N_GUARD::QAR2(B),XB(b)
- P(f);OGATEB::QAR(B)
- Refutation
- P(d);
- Try
- B(G);
- Threat
- B(G)
- Vars
- P(d);::B(G),XP(d)
- Refutation
- K(e);N_SPINB(b),S_FLIGHT
- Try
- B(G);
- Vars
- P(d);OGATEB::QAR(B)
- S(a);N_GUARD::QAR2(B),XB(b)
- P(f);OGATEB::QAR(B)
- Refutation
- P(h);
- Try
- B(G);
- Vars
- P(d);OGATEB::QAR(B)
- S(a);N_GUARD::QAR2(B),XB(b)
- P(f);OGATEB::QAR(B)
- Refutation
- P(h);
- Try
- R(E);
- Threat
- S(D)
- Vars
- P(g);::S(D),XP(g)
- Refutation
- P(g);XR(E)
- Try
- Q(B);N_PINB(b)
- Threat
- DUALS(2)
- Refutation
- B(b);CHECK
- Try
- Q(B);N_PINB(b)
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD::QAR2(B),XB(b)
- Refutation
- B(b);CHECK
- Try
- Actual
- S(F);
- Vars
- K(e);N_SPINB(b),S_FLIGHT::B(G)
- K(e);N_SPINB(b),S_FLIGHT::S(F)
- P(d);SBLOCK::S(F)
- S(a);N_GUARD::QAR2(B),XB(b)
- P(f);SBLOCK::B(G)
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).