MESON Chess Problem Database
Problem Display
PID: 96445 (8/8/8/1K2pN2/2Q2p2/2p1p3/npkPpnB1/brrbB3 w - - 0 1)
Jacobs, Walter William
US Problem Bulletin, 1981
#2
6 + 13
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...f3
- 2.Sxe3#
- 1...e4
- 2.Sd4#
- 1...Sb4
- Tries
- 1.Ka4?
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 2.Qe4#
- 1...Sd3
- 2.Qb3#
- 1...Sh3
- 2.Be4#
- 2.Qe4#
- 1...Se4
- 2.Bxe4#
- 2.Qxe4#
- 1...Sg4
- 2.Be4#
- 2.Qe4#
- 1...f3
- 2.Sxe3#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...Sb4
- 1.Ka5?
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...f3
- 2.Sxe3#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...Sb4
- 1.Kb6?
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...f3
- 2.Sxe3#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...Sb4
- 1.Bf3?
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...Sb4
- 1.Be4+?
- 1...Sd3
- 2.Bxd3#
- 2.Qa4#
- 1...Sxe4!
- 1...Sd3
- 1.Bd5?
- 1...f3
- 2.Sxe3#
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 2.Qe4#
- 1...Sd3
- 2.Qb3#
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 2.Qe4#
- 1...Se4
- 2.Bxe4#
- 2.Qxe4#
- 1...Sg4
- 2.Be4#
- 2.Qe4#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...f3
- 1.Bc6?
- 1...f3
- 2.Sxe3#
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...f3
- 1.Bb7?
- 1...f3
- 2.Sxe3#
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...f3
- 1.Ba8?
- 1...f3
- 2.Sxe3#
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4
- 2.Sd4#
- 1...exd2!
- 1...f3
- 1.Qe4+?
- 1...Kb3
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sxe4!
- 1...Kb3
- 1.dxe3?
- 1...fxe3
- 2.Sxe3#
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4
- 2.Sd4#
- 1...f3!
- 1...fxe3
- 1.d4?
- 1...exd4
- 2.Sxd4#
- 1...f3
- 2.Sxe3#
- 1...Sb4
- 2.Qxc3#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4!
- 1...exd4
- 1.Ka4?
- Keys
- 1.dxc3!
- 1...Sxc3+
- 2.Qxc3#
- 1...f3
- 2.Sxe3#
- 1...Sb4
- 2.cxb4#
- 1...Sh1
- 2.Be4#
- 1...Sd3
- 2.Qa4#
- 1...Sh3
- 2.Be4#
- 1...Se4
- 2.Bxe4#
- 1...Sg4
- 2.Be4#
- 1...e4
- 2.Sd4#
- 1...Sxc3+
- 1.dxc3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(l);N_GUARD::S(F),XP(k)
- P(m);N_GUARD::S(F)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);SBLOCK::QAB1(D)
- P(l);N_GUARD::S(F),XP(k)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- K(E);P-FLIGHT
- Vars
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(l);N_GUARD::S(F),XP(k)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- K(E);P-FLIGHT
- Vars
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(l);N_GUARD::S(F),XP(k)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- B(C);
- Vars
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- B(C);CHECK
- Refutation
- S(i);XB(C)
- Try
- B(C);
- Vars
- P(l);N_GUARD::S(F),XP(k)
- S(e);N_GUARD::QAR1(D),XP(j)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- B(C);
- Vars
- P(l);N_GUARD::S(F),XP(k)
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- B(C);
- Vars
- P(l);N_GUARD::S(F),XP(k)
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- B(C);
- Vars
- P(l);N_GUARD::S(F),XP(k)
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(m);N_GUARD::S(F)
- Refutation
- P(k);XP(B)
- Try
- Q(D);CHECK,N_PINP(j)
- Vars
- K(g);S_FLIGHT::QAB1(D)
- S(i);P_SPINS(i),SBLOCK::QAB(D)
- Refutation
- S(i);XQ(D)
- Try
- P(B);XP(k)
- Vars
- P(l);XP(B)::S(F),XP(l)
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(m);N_GUARD::S(F)
- Refutation
- P(l);
- Try
- P(B);
- Vars
- P(m);XP(B)::S(F),XP(m)
- P(l);N_GUARD::S(F),XP(k)
- S(e);N_GUARD::QAR1(D),XP(j)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- Refutation
- P(m);
- Try
- Actual
- P(B);XP(j)
- Vars
- S(e);CHECK,OGATE,P_SPINS(e),XP(B)::QAR1(D),XS(e)
- P(l);N_GUARD::S(F),XP(k)
- S(e);OGATE::QAR(D)+P(B),XS(e)
- S(i);N_GUARD::B(C)
- S(i);SBLOCK::QAB(D)
- S(i);N_GUARD::B(C),XS(i)
- P(m);N_GUARD::S(F)
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).