MESON Chess Problem Database
Problem Display
PID: 101056 (3n1R2/1p2p2p/pQ6/rbrBkN2/5Np1/3R2Pp/1b1PK3/6B1 w - - 0 1)
Letzen, Einar
Good Companions, 1922
#2
10 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Qe3#
- 1...Rc2
- 2.Qe3#
- 1...Rc3
- 2.Bd4#
- 2.Qe3#
- 2.Qd4#
- 1...Rxd5
- 2.Qe3#
- 1...Rc6
- 2.Qe3#
- 1...Rc7
- 2.Qe3#
- 2.Qxc7#
- 1...Rc8
- 2.Qe3#
- 1...Bc1
- 2.Bd4#
- 1...Ba3
- 2.Bd4#
- 1...Bd4
- 2.Bxd4#
- 1...Ba4
- 2.Re3#
- 1...Bc4
- 2.Qxb2#
- 1...Bc6
- 2.Re3#
- 2.Qc7#
- 1...Bd7
- 2.Re3#
- 1...Be8
- 2.Re3#
- 1...Sc6
- 2.Qc7#
- 1...Se6
- 2.Qxe6#
- 1...Sf7
- 2.Qe6#
- 1...e6
- 2.Qd6#
- 1...h5
- 2.Sg6#
- 1...h6
- 2.Sg6#
- 1...Rc1
- Tries
- 1.Bxc5?
- threat
- 2.Qc7#
- 1...Sf7
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Bxd3+!
- threat
- 1.Bg2?
- threat
- 2.Qxc5#
- 1...Bxd3+
- 2.Sxd3#
- 1...Sf7
- 2.Qe6#
- 1...Rc1
- 2.Qe3#
- 1...Rc2
- 2.Qe3#
- 1...Rc3
- 2.Bd4#
- 2.Qe3#
- 2.Qd4#
- 1...Rc4
- 2.Rd5#
- 1...Rd5
- 2.Qe3#
- 1...Rc6
- 2.Qe3#
- 1...Rc7
- 2.Qe3#
- 2.Qxc7#
- 1...Rc8
- 2.Qe3#
- 1...Ba3
- 2.Bd4#
- 1...Bd4
- 2.Bxd4#
- 1...Ba4
- 2.Re3#
- 1...Bc4
- 2.Qxb2#
- 1...Bc6
- 2.Qc7#
- 1...Bd7
- 2.Re3#
- 1...Be8
- 2.Re3#
- 1...Se6
- 2.Qxe6#
- 1...hxg2!
- threat
- 1.Bf3?
- threat
- 2.Qxc5#
- 1...Bxd3+
- 2.Sxd3#
- 1...Sf7
- 2.Qe6#
- 1...Rc1
- 2.Qe3#
- 1...Rc2
- 2.Qe3#
- 1...Rc3
- 2.Bd4#
- 2.Qe3#
- 2.Qd4#
- 1...Rc4
- 2.Rd5#
- 1...Rd5
- 2.Qe3#
- 1...Rc6
- 2.Qe3#
- 1...Rc7
- 2.Qe3#
- 2.Qxc7#
- 1...Rc8
- 2.Qe3#
- 1...Ba3
- 2.Bd4#
- 1...Bd4
- 2.Bxd4#
- 1...Ba4
- 2.Re3#
- 1...Bc4
- 2.Qxb2#
- 1...Bc6
- 2.Qc7#
- 1...Bd7
- 2.Re3#
- 1...Be8
- 2.Re3#
- 1...Se6
- 2.Qxe6#
- 1...gxf3+!
- threat
- 1.Qxc5?
- threat
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bc6#
- 2.Bxb7#
- 2.Qe3#
- 2.Qc7#
- 1...Bxd3+
- 2.Sxd3#
- 1...Ra4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bc6#
- 2.Bxb7#
- 2.Qc7#
- 1...Ba3
- 2.Bd4#
- 2.Qe3#
- 2.Qd4#
- 2.Qc3#
- 1...Bd4
- 2.Bxd4#
- 2.Qxd4#
- 2.Qc7#
- 1...Ba4
- 2.Re3#
- 2.Qe3#
- 2.Qc7#
- 1...Bc4
- 2.Qe3#
- 2.Qc7#
- 1...Bc6
- 2.Re3#
- 2.Qe3#
- 1...Bd7
- 2.Re3#
- 2.Qe3#
- 2.Qc7#
- 1...Be8
- 2.Re3#
- 2.Qe3#
- 2.Qc7#
- 1...Sc6
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc6#
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 1...b6
- 2.Qe3#
- 2.Qc7#
- 1...Sf7!
- threat
- 1.Qxd8?
- threat
- 2.Qxe7#
- 1...Bxd3+
- 2.Sxd3#
- 1...Rc7
- 2.Qxc7#
- 1...Bd7
- 2.Re3#
- 1...e6
- 2.Qf6#
- 2.Qd6#
- 1...Rc6!
- threat
- 1.Bxc5?
- Keys
- 1.Bh1!
- threat
- 2.Qxc5#
- 1...Bxd3+
- 2.Sxd3#
- 1...Sf7
- 2.Qe6#
- 1...Rc1
- 2.Qe3#
- 1...Rc2
- 2.Qe3#
- 1...Rc3
- 2.Bd4#
- 2.Qe3#
- 2.Qd4#
- 1...Rc4
- 2.Rd5#
- 1...Rd5
- 2.Qe3#
- 1...Rc6
- 2.Qe3#
- 1...Rc7
- 2.Qe3#
- 2.Qxc7#
- 1...Rc8
- 2.Qe3#
- 1...Ba3
- 2.Bd4#
- 1...Bd4
- 2.Bxd4#
- 1...Ba4
- 2.Re3#
- 1...Bc4
- 2.Qxb2#
- 1...Bc6
- 2.Qc7#
- 1...Bd7
- 2.Re3#
- 1...Be8
- 2.Re3#
- 1...Se6
- 2.Qxe6#
- threat
- 1.Bh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- R(f);OGATE::QAR2(I)
- R(f);OGATE,P_PINP(B)::QAR2(I)
- R(f);OGATE,XB(G)::QAR2(I)
- B(a);N_GUARD::B(A)
- B(a);N_GUARD::B(A),XB(a)
- B(e);N_PINR(D)::R(D)
- B(e);OGATE::QAB(I),XB(a)
- S(l);S_CUTR(f)::QAB(I)
- S(l);N_GUARD::QAR1(I),XS(l)
- S(l);N_GUARD::QAR1(I)
- P(j);N_GUARD::QAB1(I)
- P(k);N_GUARD::S(F)
- Tries
- Try
- B(A);XR(f)
- Threat
- QAB(I)
- Vars
- S(l);N_GUARD::QAR1(I)
- S(l);N_GUARD::QAR1(I),XS(l)
- Refutation
- B(e);CHECK,XR(D)
- Try
- B(G);
- Threat
- QAR2(I),XR(f)
- Vars
- B(e);CHECK,XR(D)::S(F),XB(e)
- S(l);N_GUARD::QAR1(I)
- R(f);OGATE::QAR2(I)
- R(f);OGATE,P_PINP(B)::QAR2(I)
- R(f);N_PINR(D)::R1(D)
- B(a);N_GUARD::B(A)
- B(a);N_GUARD::B(A),XB(a)
- B(e);N_PINR(D)::R(D)
- B(e);OGATE::QAB(I),XB(a)
- B(e);N_PINR(D),S_CUTR(f)::QAB(I)
- S(l);N_GUARD::QAR1(I),XS(l)
- Refutation
- P(b);XB(G)
- Try
- B(G);
- Threat
- QAR2(I),XR(f)
- Vars
- B(e);CHECK,XR(D)::S(F),XB(e)
- S(l);N_GUARD::QAR1(I)
- R(f);OGATE::QAR2(I)
- R(f);OGATE,P_PINP(B)::QAR2(I)
- R(f);N_PINR(D)::R1(D)
- B(a);N_GUARD::B(A)
- B(a);N_GUARD::B(A),XB(a)
- B(e);N_PINR(D)::R(D)
- B(e);OGATE::QAB(I),XB(a)
- B(e);N_PINR(D),S_CUTR(f)::QAB(I)
- S(l);N_GUARD::QAR1(I),XS(l)
- Refutation
- P(c);CHECK,XB(G)
- Try
- Q(I);XR(f)
- Threat
- DUALS(7)
- Vars
- B(e);CHECK,XR(D)::S(F),XB(e)
- S(l);::QAR2(I)
- Refutation
- S(l);
- Try
- Q(I);XS(l)
- Threat
- QAR2(I),XP(j)
- Vars
- B(e);CHECK,XR(D)::S(F),XB(e)
- R(f);N_GUARD::QAB(I),XR(f)
- B(e);N_PINR(D)::R(D)
- Refutation
- R(f);
- Try
- Actual
- B(G);
- Threat
- QAR2(I),XR(f)
- Vars
- B(e);CHECK,XR(D)::S(F),XB(e)
- S(l);N_GUARD::QAR1(I)
- R(f);OGATE::QAR2(I)
- R(f);OGATE,P_PINP(B)::QAR2(I)
- R(f);N_PINR(D)::R1(D)
- B(a);N_GUARD::B(A)
- B(a);N_GUARD::B(A),XB(a)
- B(e);N_PINR(D)::R(D)
- B(e);OGATE::QAB(I),XB(a)
- B(e);N_PINR(D),S_CUTR(f)::QAB(I)
- S(l);N_GUARD::QAR1(I),XS(l)
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).