MESON Chess Problem Database
Problem Display
PID: 187937 (2R1N1R1/n3p3/1p2p3/4k2r/8/1BPP4/1Q1K2N1/8 w - - 0 1)
MacBride, Robert C
1st Prize, Four-Leaved Shamrock, 1910
#2
9 + 6
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Rg5#
- 1...Rh2
- 2.Rg5#
- 1...Rh3
- 2.Rg5#
- 1...Rh4
- 2.Rg5#
- 1...Rf5
- 2.c4#
- 1...Rg5
- 2.Rxg5#
- 1...Rh6
- 2.Rg5#
- 1...Rh7
- 2.Rg5#
- 1...Rh8
- 2.Rg5#
- 1...b5
- 2.Rc5#
- 1...Rh1
- Tries
- 1.Bd1?
- 1...Kd5
- 2.c4#
- 1...Sxc8
- 2.Qb5#
- 1...Rh1
- 2.Rg5#
- 1...Rh2
- 2.Rg5#
- 1...Rh3
- 2.Rg5#
- 1...Rh4
- 2.Rg5#
- 1...Rf5
- 2.c4#
- 1...Rg5
- 2.Rxg5#
- 1...Rh6
- 2.Rg5#
- 1...Rh7
- 2.Rg5#
- 1...Rh8
- 2.Rg5#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Kf5!
- 1...Kd5
- 1.Ba2?
- 1...Sxc8
- 2.Qb5#
- 1...Rh1
- 2.Rg5#
- 1...Rh2
- 2.Rg5#
- 1...Rh3
- 2.Rg5#
- 1...Rh4
- 2.Rg5#
- 1...Rf5
- 2.c4#
- 1...Rg5
- 2.Rxg5#
- 1...Rh6
- 2.Rg5#
- 1...Rh7
- 2.Rg5#
- 1...Rh8
- 2.Rg5#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Kf5!
- 1...Sxc8
- 1.Ba4?
- 1...Kd5
- 2.c4#
- 1...Sxc8
- 2.Qb5#
- 1...Rh1
- 2.Rg5#
- 1...Rh2
- 2.Rg5#
- 1...Rh3
- 2.Rg5#
- 1...Rh4
- 2.Rg5#
- 1...Rf5
- 2.c4#
- 1...Rg5
- 2.Rxg5#
- 1...Rh6
- 2.Rg5#
- 1...Rh7
- 2.Rg5#
- 1...Rh8
- 2.Rg5#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Kf5!
- 1...Kd5
- 1.d4+?
- 1...Kf5
- 2.Bc2#
- 2.Qb1#
- 2.Qc2#
- 1...Ke4!
- 1...Kf5
- 1.Bd1?
- Keys
- 1.Bc2!
- 1...Kd5
- 2.c4#
- 1...Kf5
- 2.d4#
- 1...Sxc8
- 2.Qb5#
- 1...Rh1
- 2.Rg5#
- 1...Rh2
- 2.Rg5#
- 1...Rh3
- 2.Rg5#
- 1...Rh4
- 2.Rg5#
- 1...Rf5
- 2.c4#
- 1...Rg5
- 2.Rxg5#
- 1...Rh6
- 2.Rg5#
- 1...Rh7
- 2.Rg5#
- 1...Rh8
- 2.Rg5#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Kd5
- 1.Bc2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::R(I)
- R(b);N_GUARD,P_PINS(C)::R(I)
- R(b);SBLOCK::QAB(A)+P(E)
- R(b);N_GUARD::R(I),XR(b)
- P(c);N_GUARD::R(G)
- Tries
- Try
- B(D);
- Vars
- K(a);P-FLIGHT::P(E)
- S(e);N_GUARD,XR(G)::QAR(A)
- R(b);N_GUARD::R(I)
- R(b);N_GUARD,P_PINS(C)::R(I)
- R(b);SBLOCK::QAB(A)+P(E)
- R(b);N_GUARD::R(I),XR(b)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- P(c);N_GUARD::R(G)
- Refutation
- K(a);P-FLIGHT
- Try
- B(D);
- Vars
- S(e);N_GUARD,XR(G)::QAR(A)
- R(b);N_GUARD::R(I)
- R(b);N_GUARD,P_PINS(C)::R(I)
- R(b);SBLOCK::QAB(A)+P(E)
- R(b);N_GUARD::R(I),XR(b)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- P(c);N_GUARD::R(G)
- Refutation
- K(a);P-FLIGHT
- Try
- B(D);
- Vars
- K(a);P-FLIGHT::P(E)
- S(e);N_GUARD,XR(G)::QAR(A)
- R(b);N_GUARD::R(I)
- R(b);N_GUARD,P_PINS(C)::R(I)
- R(b);SBLOCK::QAB(A)+P(E)
- R(b);N_GUARD::R(I),XR(b)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- P(c);N_GUARD::R(G)
- Refutation
- K(a);P-FLIGHT
- Try
- P(F);CHECK
- Refutation
- K(a);P-FLIGHT
- Try
- Actual
- B(D);
- Vars
- K(a);P-FLIGHT::P(E)
- K(a);P-FLIGHT::B(D)+P(F)
- S(e);N_GUARD,XR(G)::QAR(A)
- R(b);N_GUARD::R(I)
- R(b);N_GUARD,P_PINS(C)::R(I)
- R(b);SBLOCK::QAB(A)+P(E)
- R(b);N_GUARD::R(I),XR(b)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- P(c);N_GUARD::R(G)
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).