MESON Chess Problem Database
Problem Display
PID: 204525 (KQ6/p2rP3/B7/6p1/N2kP1R1/1p2pp2/P7/b3B1Nq w - - 0 1)
Grunfeld, Max
L'Alfiere di Re, 1925
#2
10 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Qh8#
- 1...Qxg1
- 2.Qh8#
- 1...Qh2
- 2.Sxf3#
- 1...Qh4
- 2.Sxf3#
- 1...Qh5
- 2.Sxf3#
- 1...Qh6
- 2.Sxf3#
- 1...Qh7
- 2.Sxf3#
- 1...Qh8
- 2.Sxf3#
- 2.Qxh8#
- 1...Rd5
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 1...Rb7
- 2.Qd6#
- 1...Rxe7
- 2.Qd6#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- 1...Bc3
- 2.Bxc3#
- 1...b2
- 2.Bc3#
- 1...e2
- 2.Bf2#
- 1...f2
- 2.Se2#
- 1...Qg2
- Tries
- 1.Bg3?
- threat
- 2.Be5#
- 2.Qe5#
- 2.Qb4#
- 1...Rxe7
- 2.Qd6#
- 2.Qb4#
- 1...e2
- 2.Bf2#
- 1...Qh2
- 2.Sxf3#
- 2.Qe5#
- 2.Qb4#
- 1...Qh8
- 2.Sxf3#
- 2.Qxh8#
- 1...Rd5
- 2.Qb4#
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 2.Qb4#
- 1...Rb7
- 2.Be5#
- 2.Qe5#
- 2.Qd6#
- 1...Rd8
- 2.Be5#
- 2.Qxd8#
- 2.exd8Q#
- 2.exd8R#
- 1...Bc3
- 2.Be5#
- 2.Qe5#
- 1...Rc7!
- threat
- 1.Bb4?
- threat
- 2.Bc5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd5
- 2.e5#
- 1...Rc7!
- threat
- 1.Qh2?
- 1...Rd8+
- 2.exd8Q#
- 2.exd8R#
- 1...Qxg1
- 2.Qh8#
- 1...Qxh2
- 2.Sxf3#
- 1...Rxe7
- 2.Qd6#
- 1...e2
- 2.Bf2#
- 1...Qg2
- 2.Qh8#
- 1...Rd5
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 1...Rb7
- 2.Qd6#
- 1...Rc7
- 2.Qd6#
- 1...Bb2
- 2.Qxb2#
- 1...Bc3
- 2.Bxc3#
- 1...b2
- 2.Bc3#
- 1...f2
- 2.Se2#
- 1...bxa2!
- 1...Rd8+
- 1.Qb5?
- threat
- 2.Qc5#
- 2.e5#
- 1...Rd8+
- 2.exd8Q#
- 2.exd8R#
- 1...Qxg1
- 2.Qc5#
- 1...Rd5
- 2.Qxd5#
- 1...e2
- 2.Bf2#
- 2.Qc5#
- 1...Qg2
- 2.Qc5#
- 1...Qh2
- 2.Sxf3#
- 2.Qc5#
- 1...Qh3
- 2.Qc5#
- 1...Qh4
- 2.Sxf3#
- 2.Qc5#
- 1...Qh5
- 2.Sxf3#
- 2.Qc5#
- 1...Qh7
- 2.Sxf3#
- 2.Qc5#
- 1...Rc7
- 2.Qd5#
- 2.e5#
- 1...f2
- 2.Se2#
- 2.Qc5#
- 1...Qh8+!
- threat
- 1.Qb6+?
- 1...Ke5
- 2.Bg3#
- 1...axb6!
- 1...Ke5
- 1.e8Q?
- threat
- 2.Qbe5#
- 2.Qxd7#
- 2.Qb4#
- 2.Qee5#
- 1...e2
- 2.Bf2#
- 1...Qh2
- 2.Sxf3#
- 2.Qb4#
- 1...Qh6
- 2.Sxf3#
- 2.Qbe5#
- 2.Qb4#
- 2.Qee5#
- 1...Qh7
- 2.Sxf3#
- 2.Qbe5#
- 2.Qb4#
- 2.Qee5#
- 1...Qh8
- 2.Sxf3#
- 2.Qxd7#
- 2.Qb4#
- 1...Rd5
- 2.Qb4#
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 2.Qb4#
- 1...Rb7
- 2.Qbe5#
- 2.Qd6#
- 2.Qee5#
- 1...Re7
- 2.Qd6#
- 1...Rf7
- 2.Qbe5#
- 2.Qd6#
- 2.Qb4#
- 2.Qee5#
- 1...Rg7
- 2.Qbe5#
- 2.Qd6#
- 2.Qb4#
- 2.Qee5#
- 1...Rh7
- 2.Qbe5#
- 2.Qd6#
- 2.Qb4#
- 2.Qee5#
- 1...Rd8
- 2.Qbxd8#
- 2.Qe5#
- 2.Qexd8#
- 1...Bc3
- 2.Bxc3#
- 2.Qbe5#
- 2.Qxd7#
- 2.Qee5#
- 1...Rc7!
- threat
- 1.e8R?
- threat
- 2.Qe5#
- 2.Qb4#
- 1...e2
- 2.Bf2#
- 1...Qh2
- 2.Sxf3#
- 2.Qb4#
- 1...Qh8
- 2.Sxf3#
- 2.Qb4#
- 1...Rd5
- 2.Qb4#
- 2.e5#
- 1...Rd6
- 2.Qxd6#
- 2.Qb4#
- 1...Rb7
- 2.Qe5#
- 2.Qd6#
- 1...Re7
- 2.Qd6#
- 1...Rd8
- 2.Rxd8#
- 2.Qxd8#
- 1...Bc3
- 2.Bxc3#
- 2.Qe5#
- 1...Rc7!
- threat
- 1.Bg3?
- Keys
- 1.Bh4!
- threat
- 2.Qh8#
- 1...Qxh4
- 2.Sxf3#
- 1...Rxe7
- 2.Qd6#
- 1...Rd6
- 2.Qxd6#
- 1...e2
- 2.Bf2#
- 1...Qh2
- 2.Sxf3#
- 1...Rd5
- 2.e5#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- threat
- 1.Bh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD::QAB(J)
- Q(b);N_GUARD,XS(B)::QAB(J)
- Q(b);N_GUARD::S(B),XP(e)
- R(i);SBLOCK::R(F)+P(E)
- R(i);N_GUARD::QAR2(J),XR(i)
- R(i);N_GUARD::QAR2(J)
- R(i);N_GUARD,XP(H)::QAR2(J)
- R(i);OGATE,P_PINQ(J)::PXR(i)=Q
- B(a);N_GUARD::B(A),XB(a)
- P(c);S_CUTB(a)::B(A)
- P(d);OGATEB::B(A)
- P(e);N_GUARD,P_PINP(E)::S(B)
- Tries
- Try
- B(A);
- Threat
- DUALS(3)
- Vars
- P(d);OGATEB::B(A)
- Refutation
- R(i);
- Try
- B(A);
- Threat
- B(A)
- Vars
- R(i);N_GUARD::QAR2(J),XR(i)
- R(i);SBLOCK::R(F)+P(E)
- Refutation
- R(i);
- Try
- Q(J);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- Q(b);N_GUARD,XS(B)::QAB(J)
- Q(b);N_GUARD,XQ(J)::S(B),XP(e)
- R(i);N_GUARD,XP(H)::QAR2(J)
- P(d);OGATEB::B(A)
- Q(b);N_GUARD::QAB(J)
- R(i);SBLOCK::R(F)+P(E)
- R(i);N_GUARD::QAR2(J),XR(i)
- R(i);N_GUARD::QAR2(J)
- B(a);N_GUARD::QAB(J),XB(a)
- B(a);N_GUARD::B(A),XB(a)
- P(c);S_CUTB(a)::B(A)
- P(e);N_GUARD,P_PINP(E)::S(B)
- Refutation
- P(c);XP(C)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- Q(b);XS(B)::QAB1(J)
- R(i);N_GUARD::QAR1(J),XR(i)
- Q(b);::QAB1(J)
- Refutation
- Q(b);CHECK
- Try
- Q(J);CHECK
- Vars
- K(f);S_FLIGHT::B(A)
- Refutation
- P(h);XQ(J)
- Try
- P(H);
- Threat
- DUALS(4)
- Vars
- P(d);OGATEB::B(A)
- R(i);N_GUARD::QAR2(J)
- Refutation
- R(i);
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- P(d);OGATEB::B(A)
- R(i);N_GUARD::QAR2(J)
- Refutation
- R(i);
- Try
- Actual
- B(A);
- Threat
- QAB(J)
- Vars
- Q(b);N_GUARD,XB(A)::S(B),XP(e)
- R(i);N_GUARD,XP(H)::QAR2(J)
- R(i);N_GUARD::QAR2(J),XR(i)
- P(d);OGATEB::B(A)
- Q(b);N_GUARD::S(B),XP(e)
- R(i);SBLOCK::R(F)+P(E)
- R(i);OGATE,P_PINQ(J)::PXR(i)=Q
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).