MESON Chess Problem Database
Problem Display
PID: 198897 (1Q6/5pR1/3p1n1p/2Nbk1NP/3p1nP1/2PB1R2/1K6/4B3 w - - 0 1)
Church, EL
San Francisco Chronicle, 1921
#2
11 + 8
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Se2
- 2.Rf5#
- 1...Sg2
- 2.Rf5#
- 1...Sxd3+
- 2.Sxd3#
- 1...Sh3
- 2.Rf5#
- 1...S4xh5
- 2.Rf5#
- 1...Se6
- 2.Sxf7#
- 2.Rf5#
- 1...Sg6
- 2.Rf5#
- 1...Se4
- 2.Sd7#
- 1...Sxg4
- 2.Sd7#
- 1...S6xh5
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...Se8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...dxc3+
- 2.Bxc3#
- 1...hxg5
- 2.Rxg5#
- 1...Se2
- Tries
- 1.Qb4?
- threat
- 2.Qxd4#
- 2.cxd4#
- 1...Sxd3+
- 2.Sxd3#
- 1...dxc3+
- 2.Bxc3#
- 2.Qxc3#
- 1...Bxf3
- 2.Qxd4#
- 1...Sxg4
- 2.Sd7#
- 2.Qxd4#
- 1...S6xh5
- 2.Sd7#
- 2.Qxd4#
- 1...dxc5
- 2.Qb8#
- 1...Ba2
- 2.Qxd4#
- 1...Bb3
- 2.Qxd4#
- 1...Be4
- 2.Qxd4#
- 1...Bc6
- 2.Qxd4#
- 1...Be6
- 2.Qxd4#
- 1...Bb7
- 2.Qxd4#
- 1...Ba8
- 2.Qxd4#
- 1...Se4
- 2.Sd7#
- 2.Qxd4#
- 1...Sd7
- 2.Sxd7#
- 2.Qxd4#
- 1...Sh7
- 2.Sd7#
- 2.Qxd4#
- 1...Se8
- 2.Sd7#
- 2.Qxd4#
- 1...Sg8
- 2.Sd7#
- 2.Qxd4#
- 1...Se2
- 2.Rf5#
- 1...Se6
- 2.Sxf7#
- 2.Rf5#
- 1...Bc4!
- threat
- 1.Qe8+?
- 1...Se6
- 2.Sxf7#
- 2.Bg3#
- 2.Rf5#
- 1...Sxe8
- 2.Sd7#
- 1...Be6!
- 1...Se6
- 1.Qb4?
- Keys
- 1.Qb5!
- 1...Sxd3+
- 2.Sxd3#
- 1...dxc3+
- 2.Bxc3#
- 1...Bxf3
- 2.Sd7#
- 1...S4xh5
- 2.Rf5#
- 1...Sxg4
- 2.Sd7#
- 1...S6xh5
- 2.Sd7#
- 1...dxc5
- 2.Qb8#
- 1...hxg5
- 2.Rxg5#
- 1...Ba2
- 2.Sd7#
- 1...Bb3
- 2.Sd7#
- 1...Bc4
- 2.Sd7#
- 1...Be4
- 2.Sd7#
- 1...Bc6
- 2.Sd7#
- 1...Be6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Ba8
- 2.Sd7#
- 1...Se4
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...Se8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...Se2
- 2.Rf5#
- 1...Sg2
- 2.Rf5#
- 1...Sh3
- 2.Rf5#
- 1...Se6
- 2.Sxf7#
- 2.Rf5#
- 1...Sg6
- 2.Rf5#
- 1...Sxd3+
- 1.Qb5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 0
- Sets
- S(b);OGATE::R1(E)
- S(b);CHECK,XB(D)::S(G),XS(b)
- S(b);OGATE,XP(I)::R1(E)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD,XP(F)::S(G)
- S(f);N_GUARD,XP(I)::S(G)
- S(f);N_GUARD::S(G),XS(f)
- P(a);CHECK,OGATE,XP(C)::B(A),XP(a)
- P(g);OGATE,XS(H)::R(J),XP(g)
- Tries
- Try
- Q(K);N_PINP(e)
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,XB(D)::S(G),XS(b)
- B(c);XR(E)::QAB1(K),XP(a)
- P(e);OGATEB,XS(G)::QAB(K)
- B(c);::QAB1(K),XP(a)
- S(b);OGATE::R1(E)
- Refutation
- B(c);
- Try
- Q(K);CHECK,N_PINP(e)
- Vars
- S(f);XQ(K)::S(G)
- Refutation
- B(c);P_SPINB(c)
- Try
- Actual
- Q(K);N_PINP(e)
- Vars
- S(b);CHECK,XB(D)::S(G),XS(b)
- P(a);CHECK,OGATE,XP(C)::B(A),XP(a)
- B(c);XR(E)::QAR(K)+S(G),DCHECK
- S(b);OGATE,XP(I)::R1(E)
- S(f);N_GUARD,XP(F)::S(G)
- S(f);N_GUARD,XP(I)::S(G)
- P(e);OGATEB,XS(G)::QAB(K)
- P(g);OGATE,XS(H)::R(J),XP(g)
- B(c);::QAR(K)+S(G),DCHECK
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- S(b);OGATE::R1(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).