MESON Chess Problem Database
Problem Display
PID: 204512 (1B5K/n3pR2/2Pq1N2/4k3/2B2pP1/2P5/1Q6/2n5 w - - 0 1)
Grunfeld, Max
L'Alfiere di Re, 1925
#2
9 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qc7
- 2.Bxc7#
- 1...Qxb8+
- 2.Qxb8#
- 1...Sa2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qe2#
- 1...Sb5
- 2.Qxb5#
- 1...Sxc6
- 2.Qb5#
- 1...Sc8
- 2.Qb5#
- 1...f3
- 2.Qh2#
- 1...exf6
- 2.Re7#
- 1...Qc7
- Tries
- 1.Kg7?
- threat
- 2.Rxe7#
- 1...Qxb8
- 2.Qxb8#
- 1...Sxc6
- 2.Qb5#
- 1...exf6
- 2.Re7#
- 1...Qc7
- 2.Bxc7#
- 1...f3
- 2.Qh2#
- 1...Sc8
- 2.Qb5#
- 1...e6!
- threat
- 1.Kh7?
- 1...Qxb8
- 2.Qxb8#
- 1...Sxc6
- 2.Qb5#
- 1...exf6
- 2.Re7#
- 1...Qc7
- 2.Bxc7#
- 1...f3
- 2.Qh2#
- 1...Sa2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qe2#
- 1...Sb5
- 2.Qxb5#
- 1...Sc8
- 2.Qb5#
- 1...e6!
- 1...Qxb8
- 1.Kg8?
- 1...Qxb8+
- 2.Qxb8#
- 1...Sxc6
- 2.Qb5#
- 1...exf6
- 2.Re7#
- 1...Qc7
- 2.Bxc7#
- 1...f3
- 2.Qh2#
- 1...Sa2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qe2#
- 1...Sb5
- 2.Qxb5#
- 1...Sc8
- 2.Qb5#
- 1...e6!
- 1...Qxb8+
- 1.Rf8?
- 1...Qxb8
- 2.Qxb8#
- 1...Sxc6
- 2.Qb5#
- 1...exf6
- 2.Re8#
- 1...Qc7
- 2.Bxc7#
- 1...f3
- 2.Qh2#
- 1...Sa2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qe2#
- 1...Sb5
- 2.Qxb5#
- 1...Sc8
- 2.Qb5#
- 1...e6!
- 1...Qxb8
- 1.Qxc1?
- threat
- 2.Qe1#
- 1...Qc7
- 2.Bxc7#
- 1...f3
- 2.Qe3#
- 2.Qg5#
- 1...Qxb8+!
- threat
- 1.Qb1?
- threat
- 2.Sd7#
- 2.Qe4#
- 2.Qf5#
- 1...Qxb8+
- 2.Qxb8#
- 1...exf6
- 2.Re7#
- 2.Qf5#
- 1...Qc7
- 2.Bxc7#
- 1...e6
- 2.Sd7#
- 2.Qe4#
- 1...Sd3!
- threat
- 1.Qc2?
- threat
- 2.Sd7#
- 2.Qe4#
- 2.Qf5#
- 1...exf6
- 2.Re7#
- 2.Qf5#
- 1...Qc7
- 2.Bxc7#
- 1...e6
- 2.Sd7#
- 2.Qe4#
- 1...Sd3
- 2.Qe2#
- 1...Qxb8+!
- threat
- 1.Qd2?
- threat
- 2.Qd4#
- 2.Qd5#
- 1...Sxc6
- 2.Qd5#
- 1...e6
- 2.Bxd6#
- 2.Qd4#
- 2.Qxd6#
- 1...Se2
- 2.Qxe2#
- 2.Qd5#
- 1...Sb3
- 2.Qe1#
- 2.Qe2#
- 2.Qd5#
- 1...Sd3
- 2.Qe2#
- 1...Sb5
- 2.Qd5#
- 1...f3
- 2.Qe3#
- 2.Qg5#
- 2.Qh2#
- 2.Qd4#
- 1...Qxb8+!
- threat
- 1.Qf2?
- threat
- 2.Qd4#
- 2.Qc5#
- 1...Sxc6
- 2.Qc5#
- 1...exf6
- 2.Re7#
- 2.Qd4#
- 1...f3
- 2.Qe3#
- 2.Qg3#
- 2.Qd4#
- 2.Qh2#
- 1...Se2
- 2.Qc5#
- 2.Qxe2#
- 1...Sb3
- 2.Qe1#
- 2.Qe2#
- 1...Sd3
- 2.Qd4#
- 2.Qe2#
- 1...Sb5
- 2.Qc5#
- 1...Qxb8+!
- threat
- 1.Qg2?
- threat
- 2.Sd7#
- 2.Qe4#
- 2.Qd5#
- 1...exf6
- 2.Re7#
- 2.Qd5#
- 1...Qc7
- 2.Bxc7#
- 2.Qd5#
- 1...f3
- 2.Qh2#
- 2.Qg3#
- 1...e6
- 2.Sd7#
- 2.Qe4#
- 1...Qxb8+!
- threat
- 1.Qh2?
- threat
- 2.Qh5#
- 1...exf6
- 2.Re7#
- 1...Qc7
- 2.Bxc7#
- 1...Qxb8+!
- threat
- 1.Qb6?
- threat
- 2.Qd4#
- 2.Qc5#
- 1...Qxb8+
- 2.Qxb8#
- 1...Sxc6
- 2.Qc5#
- 2.Qb5#
- 1...exf6
- 2.Re7#
- 2.Qd4#
- 1...f3
- 2.Qe3#
- 2.Qd4#
- 1...Se2
- 2.Qc5#
- 1...Sd3
- 2.Qd4#
- 1...Sb5
- 2.Qc5#
- 2.Qxb5#
- 1...Sb3!
- threat
- 1.Kg7?
- Keys
- 1.Ba2!
- 1...Qxb8+
- 2.Qxb8#
- 1...Sxa2
- 2.Qe2#
- 1...Sxc6
- 2.Qb5#
- 1...exf6
- 2.Re7#
- 1...Qc7
- 2.Bxc7#
- 1...Sb3
- 2.Qe2#
- 1...f3
- 2.Qh2#
- 1...e6
- 2.c4#
- 1...Se2
- 2.Qxe2#
- 1...Sd3
- 2.Qe2#
- 1...Sb5
- 2.Qxb5#
- 1...Sc8
- 2.Qb5#
- 1...Qxb8+
- 1.Ba2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(d);OGATEB::B(H),XQ(d)
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- S(a);N_GUARD::QAR(A)
- S(a);N_GUARD::QAR(A),XS(a)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD,XP(E)::QAR(A)
- S(e);N_GUARD::QAR(A)
- P(b);OGATEB::QAB(A)
- P(f);SBLOCK,XS(F)::R(G)
- Tries
- Try
- K(I);S_FLIGHT
- Threat
- R(G),XP(f)
- Vars
- Q(d);N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- S(e);N_GUARD,XP(E)::QAR(A)
- P(f);XS(F)::R(G)
- Q(d);OGATEB::B(H),XQ(d)
- P(b);OGATEB::QAB(A)
- S(e);N_GUARD::QAR(A)
- Refutation
- P(f);
- Try
- K(I);P-FLIGHT
- Vars
- Q(d);N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- S(e);N_GUARD,XP(E)::QAR(A)
- P(f);SBLOCK,XS(F)::R(G)
- Q(d);OGATEB::B(H),XQ(d)
- P(b);OGATEB::QAB(A)
- S(a);N_GUARD::QAR(A)
- S(a);N_GUARD::QAR(A),XS(a)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- Refutation
- P(f);
- Try
- K(I);P-FLIGHT
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- S(e);N_GUARD,XP(E)::QAR(A)
- P(f);SBLOCK,XS(F)::R(G)
- Q(d);OGATEB::B(H),XQ(d)
- P(b);OGATEB::QAB(A)
- S(a);N_GUARD::QAR(A)
- S(a);N_GUARD::QAR(A),XS(a)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- Refutation
- P(f);
- Try
- R(G);
- Vars
- Q(d);N_SPINQ(d),OGATE,P_PINR(G),XB(H)::QAB(A),XQ(d)
- S(e);N_GUARD,XP(E)::QAR(A)
- P(f);OGATEB,SBLOCK,XS(F)::R(G)
- Q(d);OGATEB::B(H),XQ(d)
- P(b);OGATEB::QAB(A)
- S(a);N_GUARD::QAR(A)
- S(a);N_GUARD::QAR(A),XS(a)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(A)
- Refutation
- P(f);
- Try
- Q(A);XS(a)
- Threat
- QAR(A)
- Vars
- Q(d);OGATEB::B(H),XQ(d)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XB(H)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- Q(d);OGATEB::B(H),XQ(d)
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(d);OGATEB::B(H),XQ(d)
- S(a);N_GUARD::QAR(A)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XB(H)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(e);XP(E)::QAR1(A)
- S(a);N_GUARD::QAR(A)
- S(e);::QAR1(A)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XB(H)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(e);XP(E)::QAR2(A)
- S(e);::QAR2(A)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XB(H)
- Try
- Q(A);
- Threat
- DUALS(3)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XB(H)
- Try
- Q(A);P_PINP(b)
- Threat
- QAR(A)
- Vars
- P(f);SBLOCK,XS(F)::R(G)
- Q(d);OGATEB::B(H),XQ(d)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XB(H)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- S(a);::QAR2(A)
- S(a);::QAB1(A)
- Refutation
- S(a);
- Try
- Actual
- B(C);
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::QAB(A),XQ(d)
- S(a);N_GUARD,XB(C)::QAR(A)
- S(e);N_GUARD,XP(E)::QAR(A)
- P(f);SBLOCK,XS(F)::R(G)
- Q(d);OGATEB::B(H),XQ(d)
- S(a);N_GUARD::QAR(A)
- P(b);OGATEB::QAB(A)
- P(f);SBLOCK::QAB(A)+P(B)
- S(a);N_GUARD::QAR(A),XS(a)
- S(e);N_GUARD::QAR(A),XS(e)
- S(e);N_GUARD::QAR(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).