MESON Chess Problem Database
Problem Display
PID: 16957 (4r3/2nN2pn/b2Q2qb/r2p1N1R/p3k3/4P2R/4P1p1/B5K1 w - - 0 1)
Pedersen, Eigil Palle
1st Prize, Skakbladet, 1944
#2
9 + 12
| 3174 | The Two-move Chess Problem Tradition and Development | 1966 |
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
| 273 | Mat Plus | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Qxd6
- 2.Sxd6#
- 1...Rc5
- 2.Sxc5#
- 1...Re5
- 2.Qxe5#
- 1...Ra8
- 2.Qe5#
- 1...Rb8
- 2.Qe5#
- 1...Rc8
- 2.Qe5#
- 1...Rd8
- 2.Qe5#
- 1...Rf8
- 2.Qe5#
- 1...Rg8
- 2.Qe5#
- 1...Rh8
- 2.Qe5#
- 1...Bb5
- 2.Sc5#
- 1...Bxe3+
- 2.Rxe3#
- 1...Bf4
- 2.Qxf4#
- 1...Sb5
- 2.Sc5#
- 1...Se6
- 2.Qe5#
- 1...Sg5
- 2.Qf4#
- 1...d4
- 2.Qxd4#
- 1...Qxd6
- Tries
- 1.R3h4+?
- 1...Bf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qg4!
- 1...Bf4
- 1.Qb4+?
- 1...d4
- 2.Qxd4#
- 1...Bc4!
- 1...d4
- 1.Qe7+?
- 1...Qe6
- 2.Sd6#
- 1...Se6
- 2.Sd6#
- 1...Rxe7!
- 1...Qe6
- 1.Qb6?
- threat
- 2.Qd4#
- 1...Bxe3+
- 2.Qxe3#
- 1...Qxh5
- 2.Sg3#
- 2.Sd6#
- 1...Qg5
- 2.Sd6#
- 1...Bg5
- 2.Sg3#
- 1...Sg5
- 2.Sg3#
- 1...d4
- 2.Qxd4#
- 1...Qf6
- 2.Sg3#
- 1...Rc5
- 2.Sxc5#
- 1...Sb5
- 2.Sc5#
- 1...Se6
- 2.Sd6#
- 1...Qxb6!
- threat
- 1.Qxg6?
- threat
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sxh6#
- 2.Se7#
- 2.Sxg7#
- 2.Qxg2#
- 1...Bxe2
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sxh6#
- 2.Se7#
- 2.Sxg7#
- 1...d4
- 2.Sd6#
- 2.Qxg2#
- 1...Re5
- 2.Sd6#
- 2.Qxg2#
- 1...Re6
- 2.Sd6#
- 2.Qxg2#
- 1...Re7
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sxh6#
- 2.Sxe7#
- 2.Sxg7#
- 2.Qxg2#
- 1...Rf8
- 2.Sd6#
- 2.Qxg2#
- 1...Bf4
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sh6#
- 2.Se7#
- 2.Sxg7#
- 2.Qxg2#
- 1...Bg5
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sh6#
- 2.Se7#
- 2.Sxg7#
- 1...Sg5
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sxh6#
- 2.Se7#
- 2.Sxg7#
- 2.R3h4#
- 2.R5h4#
- 1...Sf8
- 2.Sd6#
- 2.Qxg2#
- 1...Bxe3+!
- threat
- 1.R3h4+?
- Keys
- 1.Qc5!
- threat
- 2.Qd4#
- 1...Bxe3+
- 2.Qxe3#
- 1...Qxh5
- 2.Sg3#
- 2.Sd6#
- 1...Rxc5
- 2.Sxc5#
- 1...Qg5
- 2.Sd6#
- 1...Bg5
- 2.Sg3#
- 1...Sg5
- 2.Sg3#
- 1...Qb6
- 2.Sg3#
- 1...Qf6
- 2.Sg3#
- 1...Sb5
- 2.Qc2#
- 1...Se6
- 2.Sd6#
- 1...d4
- 2.Qxd4#
- threat
- 1.Qc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- Q(g);XQ(H)::S(F),XQ(g)
- R(d);N_GUARD::S(I),XR(d)
- R(l);N_GUARD::QAR1(H),XR(l)
- R(l);N_GUARD::QAR1(H)
- B(f);S_CUTR(d)::S(I)
- B(h);CHECK,OGATE,XP(D)::R1(E),XB(h)
- B(h);N_GUARD::QAR1(H),XB(h)
- S(i);S_CUTR(d)::S(I)
- S(i);S_CUTR(l)::QAR1(H)
- S(k);S_CUTB(h)::QAR1(H)
- P(e);OGATE::QAR1(H),XP(e)
- Tries
- Try
- R(E);CHECK
- Refutation
- Q(g);P_SPINQ(g)
- Try
- Q(H);CHECK
- Vars
- P(e);P_SPINP(e)::QAR1(H),XP(e)
- Refutation
- B(f);P_SPINB(f)
- Try
- Q(H);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(F)
- S(i);P_SPINS(i)::S(F)
- Refutation
- R(l);XQ(H)
- Try
- Q(H);
- Threat
- QAR1(H)
- Vars
- B(h);CHECK,OGATE,XP(D)::QAR1(H),XB(h)
- Q(g);N_GUARD::S(F)
- B(h);S_CUTQ(g)::S(F)
- S(k);S_CUTQ(g)::S(F)
- P(e);::QAR1(H),XP(e)
- R(d);N_GUARD::S(I),XR(d)
- S(i);S_CUTR(d)::S(I)
- S(i);S_CUTQ(g)::S(F)
- Refutation
- Q(g);P_PINP(D),XQ(H)
- Try
- Q(H);XQ(g)
- Threat
- DUALS(7)
- Refutation
- B(h);CHECK,XP(D)
- Try
- Actual
- Q(H);
- Threat
- QAR1(H)
- Vars
- B(h);CHECK,OGATE,XP(D)::QAR1(H),XB(h)
- R(d);XQ(H)::S(I),XR(d)
- Q(g);N_GUARD::S(F)
- B(h);S_CUTQ(g)::S(F)
- S(k);S_CUTQ(g)::S(F)
- S(i);S_CUTB(f)::QAB(H)
- S(i);S_CUTQ(g)::S(F)
- P(e);::QAR1(H),XP(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).