MESON Chess Problem Database
Problem Display
PID: 201506 (8/2N1p3/2R1P1n1/r1b5/1p1kp3/pB4Q1/1nP2K2/B7 w - - 0 1)
Rothstein, Louis
L'Alfiere di Re, 1922
#2
8 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Bb6
- 2.Rc4#
- 1...Bd6
- 2.Rc4#
- 1...Ba7
- 2.Rc4#
- 1...Sf4
- 2.Qg7#
- 1...Sh4
- 2.Qg7#
- 1...Se5
- 2.Qe3#
- 1...Sf8
- 2.Qg7#
- 1...Sh8
- 2.Qg7#
- 1...a2
- 2.Bxb2#
- 1...e3+
- 2.Qxe3#
- 1...Ra4
- Tries
- 1.Ke2?
- 1...e3
- 2.Qxe3#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Bb6
- 2.Rc4#
- 1...Bd6
- 2.Rc4#
- 1...Ba7
- 2.Rc4#
- 1...Sh4
- 2.Qg7#
- 1...Se5
- 2.Qe3#
- 1...Sf8
- 2.Qg7#
- 1...Sh8
- 2.Qg7#
- 1...a2
- 2.Bxb2#
- 1...Sf4+!
- 1...e3
- 1.Ba2?
- 1...e3+
- 2.Qxe3#
- 1...Sf4
- 2.Qg7#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Bb6
- 2.Rc4#
- 1...Bd6
- 2.Rc4#
- 1...Ba7
- 2.Rc4#
- 1...Sh4
- 2.Qg7#
- 1...Se5
- 2.Qe3#
- 1...Sf8
- 2.Qg7#
- 1...Sh8
- 2.Qg7#
- 1...b3!
- 1...e3+
- 1.Ke2?
- Keys
- 1.Qg5!
- 1...Kc3+
- 2.Qe3#
- 1...e3+
- 2.Qxe3#
- 1...Ra4
- 2.Sb5#
- 2.Qxc5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 2.Qxc5#
- 1...Ra7
- 2.Sb5#
- 2.Qxc5#
- 1...Ra8
- 2.Sb5#
- 2.Qxc5#
- 1...Bb6
- 2.Rc4#
- 1...Bd6
- 2.Rc4#
- 1...Ba7
- 2.Rc4#
- 1...Sf4
- 2.Qg7#
- 1...Sh4
- 2.Qg7#
- 1...Se5
- 2.Qe3#
- 1...Sf8
- 2.Qg7#
- 1...Sh8
- 2.Qg7#
- 1...a2
- 2.Bxb2#
- 1...Kc3+
- 1.Qg5!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(f);N_GUARD::S(H)
- R(f);N_GUARD::S(H),XR(f)
- B(g);OGATE::R1(F)
- S(h);OGATE::QAB(E)
- S(h);SBLOCK::QAB1(E)
- P(b);N_GUARD::B(A),XS(a)
- P(e);CHECK::QAB1(E),XP(e)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- P(e);::QAB1(E),XP(e)
- R(f);N_GUARD::S(H)
- R(f);N_GUARD::S(H),XR(f)
- B(g);OGATE::R1(F)
- S(h);OGATE::QAB(E)
- S(h);SBLOCK::QAB1(E)
- P(b);N_GUARD::B(A),XS(a)
- Refutation
- S(h);CHECK
- Try
- B(D);
- Vars
- P(e);CHECK::QAB1(E),XP(e)
- S(h);OGATE::QAB(E)
- R(f);N_GUARD::S(H)
- R(f);N_GUARD::S(H),XR(f)
- B(g);OGATE::R1(F)
- S(h);SBLOCK::QAB1(E)
- Refutation
- P(c);
- Try
- Actual
- Q(E);
- Vars
- K(d);CHECK,P_SPINB(g),S_FLIGHT::QAR2(E)
- P(e);CHECK::QAB1(E),XP(e)
- R(f);N_GUARD::S(H),XR(f)
- B(g);OGATE::R1(F)
- S(h);OGATE::QAB(E)
- S(h);SBLOCK::QAB1(E)
- P(b);N_GUARD::B(A),XS(a)
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).