MESON Chess Problem Database
Problem Display
PID: 207474 (1K1N4/pP2p3/k3N3/P2n3R/pP6/P1nP4/1RP4Q/8 w - - 0 1)
Elson, Jacob
2. American Chess Congress, 1871
#2
12 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kb5
- 2.Sc7#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sxb4
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Kb5
- Tries
- 1.Sc6?
- 1...Sxb4
- 2.Sxb4#
- 2.Sc7#
- 1...Sb1
- 2.b5#
- 1...Sd1
- 2.b5#
- 1...Sa2
- 2.b5#
- 1...Se2
- 2.b5#
- 1...Se4
- 2.b5#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Kb5!
- 1...Sxb4
- 1.Rxd5?
- threat
- 2.Sc7#
- 1...Sb5
- 2.Sc5#
- 1...Sxd5!
- threat
- 1.Rh6?
- threat
- 2.Sc7#
- 1...Kb5
- 2.Sd4#
- 1...Sc7
- 2.Sxc7#
- 1...Sxb4!
- threat
- 1.Qf4?
- 1...Kb5
- 2.Sc7#
- 2.Qc4#
- 1...Sxb4
- 2.Sc7#
- 1...Sxf4
- 2.Sc7#
- 1...Sb1
- 2.Qc4#
- 1...Sd1
- 2.Qc4#
- 1...Sa2
- 2.Qc4#
- 1...Se2
- 2.Qc4#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Se4!
- 1...Kb5
- 1.Qd6+?
- 1...Kb5
- 2.Sd4#
- 2.Sc7#
- 2.Qc6#
- 1...Sb6
- 2.Sc7#
- 1...exd6!
- 1...Kb5
- 1.Qe2?
- 1...Kb5
- 2.Sc7#
- 1...Sxb4
- 2.Sc7#
- 1...Sb1
- 2.d4#
- 1...Sd1
- 2.d4#
- 1...Sa2
- 2.d4#
- 1...Se4
- 2.dxe4#
- 2.d4#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sxe2!
- 1...Kb5
- 1.Qh4?
- 1...Kb5
- 2.Sc7#
- 2.Qc4#
- 1...Sxb4
- 2.Sc7#
- 1...Sb1
- 2.Qc4#
- 1...Sd1
- 2.Qc4#
- 1...Sa2
- 2.Qc4#
- 1...Se2
- 2.Qc4#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Se4!
- 1...Kb5
- 1.d4?
- 1...Sxb4
- 2.Sc7#
- 1...Sb1
- 2.Qe2#
- 1...Sd1
- 2.Qe2#
- 1...Sa2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Se4
- 2.Qe2#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Kb5!
- 1...Sxb4
- 1.Sc6?
- Keys
- 1.Qd2!
- 1...Kb5
- 2.Sc7#
- 1...Sxb4
- 2.Sc7#
- 1...Sb1
- 2.b5#
- 1...Sd1
- 2.b5#
- 1...Sa2
- 2.b5#
- 1...Se2
- 2.b5#
- 1...Se4
- 2.b5#
- 1...Sb5
- 2.Sc5#
- 1...Se3
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sb6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Kb5
- 1.Qd2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- K(d);P_SPINS(c),S_FLIGHT::S(I)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD,XP(F)::S(I)
- S(c);N_GUARD::S(I),XS(c)
- Tries
- Try
- S(L);
- Vars
- S(a);N_GUARD::P(F)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD::S(I),XS(c)
- Refutation
- K(d);P_SPINS(c),S_FLIGHT
- Try
- R(H);XS(c)
- Threat
- S(I)
- Vars
- S(a);SBLOCK::S(I)
- Refutation
- S(a);XR(H)
- Try
- R(H);
- Threat
- R(H)+S(I),DCHECK
- Vars
- K(d);S_FLIGHT::S(I)
- S(c);::R(H)+S(I),DCHECK,XS(c)
- Refutation
- S(c);XP(F)
- Try
- Q(C);
- Vars
- S(c);N_GUARD,XP(F)::S(I)
- S(c);N_GUARD,XQ(C)::S(I)
- S(a);N_GUARD::QAB(C)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD::S(I),XS(c)
- Refutation
- S(a);
- Try
- Q(C);CHECK
- Vars
- S(c);P_SPINS(c)::S(I)
- Refutation
- P(f);XQ(C)
- Try
- Q(C);
- Vars
- K(d);P_SPINS(c),S_FLIGHT::S(I)
- S(c);N_GUARD,XP(F)::S(I)
- S(a);N_GUARD::QAB(C)+P(E)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD::S(I),XS(c)
- Refutation
- S(a);XQ(C)
- Try
- Q(C);
- Vars
- S(c);N_GUARD,XP(F)::S(I)
- S(a);N_GUARD::QAB(C)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD::S(I),XS(c)
- Refutation
- S(a);
- Try
- P(E);
- Vars
- S(c);N_GUARD,XP(F)::S(I)
- S(a);N_GUARD::QAB(C)
- S(a);N_GUARD::QAB(C),XS(a)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD::S(I),XS(c)
- Refutation
- K(d);P_SPINS(c),S_FLIGHT
- Try
- Actual
- Q(C);
- Vars
- K(d);P_SPINS(c),S_FLIGHT::S(I)
- S(c);N_GUARD,XP(F)::S(I)
- S(a);N_GUARD::P(F)
- S(a);SBLOCK::S(I)
- S(c);N_GUARD::S(I)
- S(c);N_GUARD::S(I),XS(c)
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).