MESON Chess Problem Database
Problem Display
PID: 198750 (8/1r6/p4P2/RNN2Q2/1pk1rb1q/5R2/P3bp2/nK3B2 w - - 0 1)
Niemeijer, Meindert
L'Alfiere di Re, 1921
#2
9 + 10
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bd3+
- 2.Bxd3#
- 1...Be3
- 2.Bxe2#
- 1...Sb3
- 2.axb3#
- 1...Bd3+
- Tries
- 1.Sa3+?
- 1...Kd4
- 2.Qxe4#
- 1...bxa3+!
- 1...Kd4
- 1.Sd6+?
- 1...Kd4
- 2.Qxe4#
- 1...Bxd6!
- 1...Kd4
- 1.Sa4?
- threat
- 2.Sb2#
- 2.Qxe4#
- 2.Qc5#
- 1...Bd3+
- 2.Bxd3#
- 1...Qxf6
- 2.Qc5#
- 1...Rxb5
- 2.Qxe4#
- 1...axb5
- 2.Qxe4#
- 2.Qc5#
- 1...Be3
- 2.Sb2#
- 2.Bxe2#
- 1...Be5
- 2.Qe6#
- 1...b3
- 2.Qxe4#
- 2.Qc5#
- 1...Qg5
- 2.Sb2#
- 2.Qxe4#
- 1...Qh5
- 2.Sb2#
- 2.Qxe4#
- 1...Qh7
- 2.Sb2#
- 2.Qc5#
- 1...Re3
- 2.Sb2#
- 1...Rd4
- 2.Sb2#
- 2.Qc5#
- 1...Re6
- 2.Sb2#
- 2.Qxe6#
- 2.Qc5#
- 1...Ree7
- 2.Sb2#
- 2.Qc5#
- 1...Re8
- 2.Sb2#
- 2.Qc5#
- 1...Rc7
- 2.Sb2#
- 2.Sb6#
- 2.Qxe4#
- 1...Rd7
- 2.Sb2#
- 2.Sb6#
- 2.Qc5#
- 1...Rbe7
- 2.Sb2#
- 2.Sb6#
- 2.Qc5#
- 1...Bc1
- 2.Qc5#
- 1...Bd2
- 2.Sb2#
- 2.Qc5#
- 1...Bh2
- 2.Sb2#
- 2.Qc5#
- 1...Bg3
- 2.Sb2#
- 2.Qc5#
- 1...Bg5
- 2.Sb2#
- 2.Qc5#
- 1...Bd6
- 2.Sb2#
- 1...Bh6
- 2.Sb2#
- 2.Qc5#
- 1...Bc7
- 2.Sb2#
- 2.Qc5#
- 1...Bb8
- 2.Sb2#
- 2.Qc5#
- 1...Sc2
- 2.Sb2#
- 2.Qc5#
- 1...Sb3
- 2.Sb2#
- 2.axb3#
- 1...Re5!
- threat
- 1.Sxe4?
- threat
- 2.Bxe2#
- 2.Qe6#
- 2.Qc5#
- 1...Bd3+
- 2.Bxd3#
- 1...Qxf6
- 2.Bxe2#
- 2.Qc5#
- 1...Bxf1
- 2.Qe6#
- 2.Qc5#
- 1...axb5
- 2.Qc5#
- 1...Be3
- 2.Sed6#
- 2.Bxe2#
- 1...Be5
- 2.Qe6#
- 1...b3
- 2.Ra4#
- 2.Qc5#
- 1...Qg5
- 2.Bxe2#
- 1...Qh1
- 2.Qe6#
- 2.Qc5#
- 1...Qh3
- 2.Bxe2#
- 2.Qc5#
- 1...Qg4
- 2.Bxe2#
- 2.Qc5#
- 1...Qh5
- 2.Bxe2#
- 1...Rb6
- 2.Bxe2#
- 2.Qc5#
- 1...Rc7
- 2.Bxe2#
- 2.Qe6#
- 1...Rd7
- 2.Qc5#
- 1...Re7
- 2.Bxe2#
- 2.Qc5#
- 1...Bd6
- 2.Sd2#
- 2.Sexd6#
- 2.Bxe2#
- 2.Qe6#
- 1...Sb3
- 2.Bxe2#
- 2.Qe6#
- 2.axb3#
- 1...Rxb5!
- threat
- 1.Sa3+?
- Keys
- 1.Sb3!
- threat
- 2.Qxe4#
- 2.Qc5#
- 1...Bd3+
- 2.Bxd3#
- 1...Qxf6
- 2.Qc5#
- 1...Rxb5
- 2.Qxe4#
- 1...Sxb3
- 2.axb3#
- 1...Re5
- 2.Sd6#
- 1...Be3
- 2.Bxe2#
- 1...Be5
- 2.Qe6#
- 1...Qg5
- 2.Qxe4#
- 1...Qh5
- 2.Qxe4#
- 1...Qh7
- 2.Qc5#
- 1...Re3
- 2.Sd2#
- 1...Rd4
- 2.Qc5#
- 1...Re6
- 2.Qxe6#
- 2.Qc5#
- 1...Ree7
- 2.Qc5#
- 1...Re8
- 2.Qc5#
- 1...Rc7
- 2.Qxe4#
- 1...Rd7
- 2.Qc5#
- 1...Rbe7
- 2.Qc5#
- 1...Bc1
- 2.Sd6#
- 2.Qc5#
- 1...Bd2
- 2.Sxd2#
- 2.Sd6#
- 2.Qc5#
- 1...Bh2
- 2.Sd2#
- 2.Qc5#
- 1...Bg3
- 2.Sd2#
- 2.Qc5#
- 1...Bg5
- 2.Sd6#
- 2.Qc5#
- 1...Bd6
- 2.Sd2#
- 2.Sxd6#
- 1...Bh6
- 2.Sd6#
- 2.Qc5#
- 1...Bc7
- 2.Sd2#
- 2.Qc5#
- 1...Bb8
- 2.Sd2#
- 2.Qc5#
- 1...Sc2
- 2.Qc5#
- threat
- 1.Sb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 15
- REMOVED MATES = 0
- Sets
- B(b);CHECK,OGATE::B(B),XB(b)
- B(g);S_CUTR(f)::B(B),XB(b)
- S(a);OGATE::P(C),XS(a)
- Tries
- Try
- S(F);CHECK
- Vars
- K(e);N_SPINB(b),P-FLIGHT::QAR1(H),XR(f)
- Refutation
- P(d);CHECK,XS(F)
- Try
- S(F);CHECK
- Vars
- K(e);N_SPINB(b),P-FLIGHT::QAR1(H),XR(f)
- Refutation
- B(g);XS(F)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- B(b);CHECK,OGATE::B(B),XB(b)
- Q(h);XP(I)::QAR1(H)
- R(j);XS(F)::QAR2(H),XR(f)
- B(g);S_CUTR(f)::QAB(H)
- R(f);::S(G)
- B(g);::QAR1(H)
- B(g);::S(G)
- Refutation
- R(f);
- Try
- S(G);XR(f)
- Threat
- DUALS(3)
- Vars
- B(b);CHECK,OGATE::B(B),XB(b)
- P(i);XS(F)::QAR1(H)
- B(g);::QAB(H)
- Q(h);::B(B),XB(b)
- R(j);::QAR1(H)
- Refutation
- R(j);XS(F)
- Try
- Actual
- S(G);
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,OGATE::B(B),XB(b)
- Q(h);XP(I)::QAR1(H)
- R(j);XS(F)::QAR2(H),XR(f)
- S(a);OGATE,XS(G)::P(C),XS(a)
- R(f);S_CUTB(g)::S(F)
- B(g);S_CUTR(f)::B(B),XB(b)
- B(g);S_CUTR(f)::QAB(H)
- Q(h);::QAR2(H),XR(f)
- Q(h);::QAR1(H)
- R(f);S_CUTB(g)::S(G)
- R(f);::QAR1(H)
- R(j);::QAR2(H),XR(f)
- R(j);::QAR1(H)
- S(a);::QAR1(H)
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).