MESON Chess Problem Database
Problem Display
PID: 201429 (8/7p/r2p1n1p/1Np4P/2k1p3/pR2p3/P3P1Qp/3R3K w - - 0 1)
Gross, J
L'Alfiere di Re, 1922
#2
8 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sg4
- 2.Qxe4#
- 1...Sd5
- 2.Qxe4#
- 1...Sxh5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rc1#
- 1...Ra4
- Tries
- 1.Kxh2?
- 1...Sxh5
- 2.Qxe4#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sd5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rc1#
- 1...Sg4+!
- 1...Sxh5
- 1.Rd2?
- 1...Sxh5
- 2.Qxe4#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sg4
- 2.Qxe4#
- 1...Sd5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rc2#
- 1...exd2!
- 1...Sxh5
- 1.Qf3?
- 1...Sxh5
- 2.Qxe4#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sg4
- 2.Qxe4#
- 1...Sd5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rc1#
- 1...exf3!
- 1...Sxh5
- 1.Qg4?
- 1...Sxh5
- 2.Qxe4#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sd5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rc1#
- 1...Sxg4!
- 1...Sxh5
- 1.Qg5?
- threat
- 2.Rc1#
- 1...Sd5
- 2.Qxd5#
- 1...hxg5!
- threat
- 1.Qg6?
- 1...Sxh5
- 2.Qxe4#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sg4
- 2.Qxe4#
- 1...Sd5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rc1#
- 1...hxg6!
- 1...Sxh5
- 1.Qg7?
- 1...Sxh5
- 2.Qc3#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sg4
- 2.Qc3#
- 1...Sd7
- 2.Qc3#
- 1...Se8
- 2.Qc3#
- 1...Sg8
- 2.Qc3#
- 1...d5
- 2.Rc1#
- 1...Sd5!
- 1...Sxh5
- 1.Qg8+?
- 1...Sd5
- 2.Rc1#
- 2.Qxd5#
- 1...d5
- 2.Rc1#
- 1...Sxg8!
- 1...Sd5
- 1.Kxh2?
- Keys
- 1.Rdd3!
- 1...Sxh5
- 2.Qxe4#
- 1...exd3
- 2.exd3#
- 1...Ra4
- 2.Sxd6#
- 1...Ra5
- 2.Sxd6#
- 1...Rb6
- 2.Sxa3#
- 1...Rc6
- 2.Sxa3#
- 1...Ra7
- 2.Sxd6#
- 1...Ra8
- 2.Sxd6#
- 1...Sg4
- 2.Qxe4#
- 1...Sd5
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...Sg8
- 2.Qxe4#
- 1...d5
- 2.Rdc3#
- 1...Sxh5
- 1.Rdd3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- P(h);SBLOCK::R(A)
- Tries
- Try
- K(B);P-FLIGHT,XP(a)
- Vars
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- P(h);SBLOCK::R(A)
- Refutation
- S(i);CHECK
- Try
- R(A);
- Vars
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- P(h);SBLOCK::R(A)
- Refutation
- P(c);XR(A)
- Try
- Q(E);
- Vars
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- P(h);SBLOCK::R(A)
- Refutation
- P(e);XQ(E)
- Try
- Q(E);P_PINP(e)
- Vars
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- P(h);SBLOCK::R(A)
- Refutation
- S(i);N_SPINP(e),XQ(E)
- Try
- Q(E);
- Threat
- R(A)
- Vars
- S(i);N_GUARD::QAB1(E),XS(i)
- Refutation
- P(j);XQ(E)
- Try
- Q(E);
- Vars
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- P(h);SBLOCK::R(A)
- Refutation
- P(k);XQ(E)
- Try
- Q(E);
- Vars
- S(i);OGATE,XP(H)::QAR1(E)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);OGATE::QAR1(E)
- P(h);SBLOCK::R(A)
- Refutation
- S(i);
- Try
- Q(E);CHECK
- Vars
- P(h);P_SPINP(h)::R(A)
- Refutation
- S(i);XQ(E)
- Try
- Actual
- R(A);
- Vars
- S(i);N_GUARD,XP(H)::QAR2(E),XP(e)
- P(e);OGATE,XR(A)::P(D),XP(e)
- R(g);N_GUARD::S(G),XP(h)
- R(g);N_GUARD::S(G),XP(b)
- S(i);N_GUARD::QAR2(E),XP(e)
- P(h);SBLOCK::R1(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).