MESON Chess Problem Database
Problem Display
PID: 204517 (B1N1b2K/pR1p2N1/Pbq4p/3k3r/3B2p1/1PP3P1/R7/1Q6 w - - 0 1)
Grunfeld, Max
L'Alfiere di Re, 1925
#2
12 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qa4
- 2.Rxd7#
- 1...Qb5
- 2.Rxd7#
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc3
- 2.Rxd7#
- 1...Qc4
- 2.Rxd7#
- 1...Qc5
- 2.Rxd7#
- 1...Qd6
- 2.Rxd7#
- 1...Qe6
- 2.Rxd7#
- 1...Qf6
- 2.Rxd7#
- 1...Qg6
- 2.Rxd7#
- 1...Qc7
- 2.Rxc7#
- 1...Qxc8
- 2.Rxd7#
- 1...Rh1
- 2.Qf5#
- 2.Qxh1#
- 1...Rh2
- 2.Qf5#
- 1...Rh3
- 2.Qf5#
- 1...Rh4
- 2.Qf5#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qh1#
- 1...Ba5
- 2.Rb5#
- 1...Bc7
- 2.Rb5#
- 1...Bd8
- 2.Rb5#
- 1...Bg6
- 2.Rxd7#
- 1...Bf7
- 2.Rxd7#
- 1...d6
- 2.Se7#
- 1...Qa4
- Tries
- 1.Re2?
- threat
- 2.Qe4#
- 1...Qxc8
- 2.Rxd7#
- 1...Qe6
- 2.Rxd7#
- 1...Qg6
- 2.Rxd7#
- 1...Re5
- 2.Rxe5#
- 1...Bg6
- 2.Rxd7#
- 1...Bxd4!
- threat
- 1.Ra5+?
- 1...Qb5
- 2.Rxb6#
- 2.Rxa7#
- 2.Rc7#
- 2.Rxd7#
- 2.Rb8#
- 1...Qc5
- 2.Rxb6#
- 2.Rxa7#
- 2.Rc7#
- 2.Rxd7#
- 2.Rb8#
- 1...Bxa5
- 2.Rb5#
- 1...Bc5!
- 1...Qb5
- 1.Rxb6?
- threat
- 2.Ra5#
- 2.Rb5#
- 1...Qxa8
- 2.Se7#
- 2.Ra5#
- 2.Rd6#
- 1...Qb7
- 2.Se7#
- 2.Bxb7#
- 2.Ra5#
- 2.Rd6#
- 1...axb6!
- threat
- 1.Qd3?
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc3
- 2.Rxd7#
- 1...Qxc8
- 2.Rxd7#
- 1...Bxd4
- 2.Rb5#
- 2.Qxd4#
- 1...Qa4
- 2.Rxd7#
- 1...Qb5
- 2.Rxd7#
- 1...Qc4
- 2.Rxd7#
- 1...Qc5
- 2.Rxd7#
- 1...Qd6
- 2.Rxd7#
- 1...Qe6
- 2.Rxd7#
- 1...Qf6
- 2.Rxd7#
- 1...Qg6
- 2.Rxd7#
- 1...Qc7
- 2.Rxc7#
- 1...Re5
- 2.Bxb6#
- 1...Rh1
- 2.Qf5#
- 1...Rh2
- 2.Qf5#
- 1...Rh3
- 2.Qf5#
- 1...Rh4
- 2.Qf5#
- 1...Rf5
- 2.Qxf5#
- 1...Ba5
- 2.Rb5#
- 1...Bc5
- 2.c4#
- 1...Bc7
- 2.Rb5#
- 1...Bd8
- 2.Rb5#
- 1...Bg6
- 2.Rxd7#
- 1...Bf7
- 2.Rxd7#
- 1...d6
- 2.Se7#
- 1...Rg5!
- 1...Qxb7
- 1.c4+?
- 1...Qxc4
- 2.Rxd7#
- 1...Kxd4!
- 1...Qxc4
- 1.Re2?
- Keys
- 1.Rd2!
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc3
- 2.Rxd7#
- 1...Qxc8
- 2.Rxd7#
- 1...Bxd4
- 2.Rb5#
- 1...Qa4
- 2.Rxd7#
- 1...Qb5
- 2.Rxd7#
- 1...Qc4
- 2.Rxd7#
- 1...Qc5
- 2.Rxd7#
- 1...Qd6
- 2.Rxd7#
- 1...Qe6
- 2.Rxd7#
- 1...Qf6
- 2.Rxd7#
- 1...Qg6
- 2.Rxd7#
- 1...Qc7
- 2.Rxc7#
- 1...Re5
- 2.Bxb6#
- 1...Rh1
- 2.Qf5#
- 2.Qxh1#
- 1...Rh2
- 2.Qf5#
- 1...Rh3
- 2.Qf5#
- 1...Rh4
- 2.Qf5#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qh1#
- 1...Ba5
- 2.Rb5#
- 1...Bc5
- 2.c4#
- 1...Bc7
- 2.Rb5#
- 1...Bd8
- 2.Rb5#
- 1...Bg6
- 2.Rxd7#
- 1...Bf7
- 2.Rxd7#
- 1...d6
- 2.Se7#
- 1...Qxb7
- 1.Rd2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(e);::B(J)+R(H),DCHECK,XP(h)
- Q(e);OGATE,P_SPINQ(e),XR(H)::B(J),XQ(e)
- Q(e);XP(D)::B(J)+R(H),DCHECK,XP(h)
- Q(e);S_CUTB(i)::B(J)+R(H),XP(h)
- Q(e);P_PINS(I)::B(J)+R(H),DCHECK,XP(h)
- Q(e);OGATEB::B(J)+R(H),XQ(e)
- Q(e);XS(K)::B(J)+R(H),DCHECK,XP(h)
- R(c);N_GUARD::QAR2(A)
- R(c);N_GUARD::QAR2(A),XR(c)
- R(c);N_GUARD::QAB(A)
- B(d);OGATE::R(H)
- B(i);N_GUARD::R(H),XP(h)
- P(h);SBLOCK::S(K)
- Tries
- Try
- R(B);
- Threat
- QAB1(A)
- Vars
- Q(e);XS(K)::B(J)+R(H),DCHECK,XP(h)
- Q(e);::B(J)+R(H),DCHECK,XP(h)
- R(c);N_GUARD::R1(B),XR(c)
- B(i);N_GUARD::R(H),XP(h)
- Refutation
- B(d);P_PINS(I),XB(F)
- Try
- R(B);CHECK
- Vars
- B(d);OGATE,XR(B)::R(H)
- Refutation
- B(d);P_SPINB(d)
- Try
- R(H);P_PINQ(e),XB(d)
- Threat
- DUALS(2)
- Refutation
- P(g);XR(H)
- Try
- Q(A);
- Vars
- Q(e);OGATE,P_SPINQ(e),XR(H)::B(J),XQ(e)
- Q(e);XP(D)::B(J)+R(H),DCHECK,XP(h)
- Q(e);XS(K)::B(J)+R(H),DCHECK,XP(h)
- Q(e);::B(J)+R(H),DCHECK,XP(h)
- Q(e);S_CUTB(i)::B(J)+R(H),XP(h)
- Q(e);P_PINS(I)::B(J)+R(H),DCHECK,XP(h)
- Q(e);OGATEB::B(J)+R(H),XQ(e)
- R(c);SBLOCK::QAR(A)+B(F),XB(d)
- R(c);N_GUARD::QAR2(A)
- R(c);N_GUARD::QAR2(A),XR(c)
- B(d);OGATE::R(H)
- B(d);S_CUTQ(e)::P(D)
- B(i);N_GUARD::R(H),XP(h)
- P(h);SBLOCK::S(K)
- Refutation
- R(c);
- Try
- P(D);CHECK
- Vars
- Q(e);XP(D)::B(J)+R(H),DCHECK,XP(h)
- Refutation
- K(b);P-FLIGHT,XB(F)
- Try
- Actual
- R(B);
- Vars
- Q(e);OGATE,P_SPINQ(e),XR(H)::B(J),XQ(e)
- Q(e);XP(D)::B(J)+R(H),DCHECK,XP(h)
- Q(e);XS(K)::B(J)+R(H),DCHECK,XP(h)
- B(d);OGATE,P_PINS(I),P_SPINB(d),XB(F)::R(H)
- Q(e);::B(J)+R(H),DCHECK,XP(h)
- Q(e);S_CUTB(i)::B(J)+R(H),XP(h)
- Q(e);P_PINS(I)::B(J)+R(H),DCHECK,XP(h)
- Q(e);OGATEB::B(J)+R(H),XQ(e)
- R(c);SBLOCK::R(B)+B(F),XB(d)
- R(c);N_GUARD::QAR2(A)
- R(c);N_GUARD::QAR2(A),XR(c)
- R(c);N_GUARD::QAB(A)
- B(d);OGATE::R(H)
- B(d);S_CUTQ(e)::P(D)
- B(i);N_GUARD::R(H),XP(h)
- P(h);SBLOCK::S(K)
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).