MESON Chess Problem Database
Problem Display
PID: 202442 (2B1R1N1/3p1ppK/qR6/1n1r1kpN/p5p1/1p2p3/bb2Q3/r4n2 w - - 0 1)
Letzen, Einar
Magyar Sakkvilag, 1923
#2
7 + 16
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rd3
- 2.Qxd3#
- 1...Rc5
- 2.Bxd7#
- 2.Qd3#
- 1...Bb1
- 2.Qxf1#
- 1...Bc1
- 2.Qxf1#
- 1...Bd4
- 2.Qd3#
- 1...Sd6
- 2.Bxd7#
- 1...g3
- 2.Qf3#
- 1...g6
- 2.Sh6#
- 1...Rd3
- Tries
- 1.Rxe3?
- threat
- 2.Se7#
- 2.Qf2#
- 1...Rd2
- 2.Se7#
- 1...Rd4
- 2.Se7#
- 2.Re5#
- 1...Re5
- 2.Qf2#
- 1...Ba3
- 2.Qf2#
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Qf2#
- 1...Sd2
- 2.Se7#
- 1...Sh2
- 2.Se7#
- 1...Sd4
- 2.Se7#
- 1...g3
- 2.Se7#
- 2.Qf3#
- 1...Sxe3!
- threat
- 1.Re4?
- threat
- 2.Qxg4#
- 1...Sh2
- 2.Sg3#
- 1...g3
- 2.Qf3#
- 2.Qg4#
- 1...Kxe4!
- threat
- 1.Qc2+?
- 1...Rd3
- 2.Bxd7#
- 2.Qxd3#
- 1...bxc2!
- 1...Rd3
- 1.Qxe3?
- threat
- 2.Se7#
- 2.Qf2#
- 2.Qe4#
- 1...Qxb6
- 2.Se7#
- 2.Qe4#
- 1...g3
- 2.Qf3#
- 2.Qe4#
- 1...Re1
- 2.Se7#
- 2.Qf2#
- 1...Rd2
- 2.Se7#
- 2.Qe4#
- 1...Rd3
- 2.Se7#
- 2.Qxd3#
- 2.Qe4#
- 1...Rd4
- 2.Sxg7#
- 2.Se7#
- 2.Re5#
- 2.Qe5#
- 1...Re5
- 2.Sxg7#
- 1...Bb1
- 2.Se7#
- 2.Qf2#
- 1...Bc1
- 2.Sxg7#
- 2.Se7#
- 2.Qe4#
- 1...Ba3
- 2.Sxg7#
- 2.Qf2#
- 2.Qe4#
- 1...Bd4
- 2.Se7#
- 2.Qd3#
- 2.Qe4#
- 1...Be5
- 2.Se7#
- 1...Bf6
- 2.Qf2#
- 2.Qe4#
- 1...Sd2
- 2.Sg3#
- 2.Se7#
- 1...Sh2
- 2.Sg3#
- 2.Se7#
- 2.Qe4#
- 1...Sg3
- 2.Sxg3#
- 2.Se7#
- 2.Qf2#
- 1...Sc3
- 2.Sxg7#
- 2.Se7#
- 2.Qf2#
- 1...Sd4
- 2.Sxg7#
- 2.Se7#
- 2.Qe4#
- 1...Sd6
- 2.Se7#
- 2.Bxd7#
- 2.Qf2#
- 1...Sxe3!
- threat
- 1.Rxe3?
- Keys
- 1.Qc4!
- threat
- 2.Qe4#
- 1...Rd4
- 2.Qxf7#
- 1...Re5
- 2.Sxg7#
- 1...Bb1
- 2.Qxf1#
- 1...Bd4
- 2.Qd3#
- 1...Be5
- 2.Se7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sc3
- 2.Sxg7#
- 1...Sd4
- 2.Qxd5#
- 1...Sd6
- 2.Bxd7#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 4
- Sets
- R(j);N_GUARD::QAB(A),XR(j)
- B(c);S_CUTR(a)::QAR(A),XS(b)
- B(d);S_CUTR(a)::QAR(A),XS(b)
- B(d);S_CUTR(j)::QAB(A)
- S(i);S_CUTR(j)::B(E),XP(n)
- P(h);N_GUARD::QAR2(A)
- P(p);N_GUARD::S(G)
- Tries
- Try
- R(F);XP(f)
- Threat
- DUALS(2)
- Vars
- R(j);::S(G)
- R(j);::QAR(A)
- B(d);::QAR(A)
- B(d);::S(G)
- S(b);::S(G)
- S(i);::S(G)
- Refutation
- S(b);XR(F)
- Try
- R(F);
- Threat
- QAB1(A),XP(h)
- Vars
- S(b);N_GUARD::S(B)
- Refutation
- K(k);N_SPINP(n),P_SPINP(f),S_FLIGHT,XR(F)
- Try
- Q(A);CHECK
- Refutation
- P(e);XQ(A)
- Try
- Q(A);XP(f)
- Threat
- DUALS(3)
- Vars
- R(j);S_CUTB(d)::S(B),XP(p)
- B(d);::S(G)
- Refutation
- S(b);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAB1(A)
- Vars
- R(j);OGATE::QAR2(A),XP(o)
- R(j);S_CUTB(d)::S(B),XP(p)
- B(c);S_CUTR(a)::QAR(A),XS(b)
- B(d);S_CUTR(j)::QAB(A)
- B(d);SBLOCK::S(G)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD::S(B),XS(b)
- S(i);S_CUTB(d)::S(B),XP(p)
- S(i);S_CUTB(d)::QAR2(A),XR(j)
- S(i);S_CUTR(j)::B(E),XP(n)
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).