MESON Chess Problem Database
Problem Display
PID: 201407 (5b2/2NK1P2/1P3Q2/q1kb4/PR2P3/P5pP/1N2n1P1/2n5 w - - 0 1)
Dent, Robert
L'Alfiere di Re, 1922
#2
12 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxb4
- 2.Sa6#
- 1...Qxb6
- 2.Qxb6#
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5+
- 2.Rxb5#
- 1...Qa6
- 2.Sxa6#
- 1...Qa7
- 2.Rb5#
- 1...Qa8
- 2.Rb5#
- 1...Ba2
- 2.Qc6#
- 1...Bb3
- 2.Qc6#
- 1...Bc4
- 2.Rxc4#
- 1...Bxe4
- 2.Rc4#
- 1...Bc6+
- 2.Qxc6#
- 1...Be6+
- 2.Sxe6#
- 1...Bb7
- 2.Se6#
- 2.Rc4#
- 1...Bxf7
- 2.Qc6#
- 1...Ba8
- 2.Se6#
- 2.Rc4#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qe7#
- 2.Qd6#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 2.Qd6#
- 1...Sa2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...Qxb4
- Tries
- 1.Sxd5?
- threat
- 2.Rc4#
- 2.Qc6#
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5+
- 2.Rxb5#
- 1...Qxb4
- 2.axb4#
- 1...Qxb6
- 2.Rc4#
- 2.Qxb6#
- 1...Qa6
- 2.Qc6#
- 1...Qa8
- 2.Rc4#
- 2.Rb5#
- 1...Bd6
- 2.Rc4#
- 2.Qxd6#
- 1...Sd4
- 2.Rc4#
- 2.Qxd4#
- 1...Qa7+!
- threat
- 1.Qc3+?
- 1...Bc4
- 2.Se6#
- 2.Qxc4#
- 1...Sxc3!
- 1...Bc4
- 1.Qe5?
- threat
- 2.Se6#
- 2.Qxd5#
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5+
- 2.Rxb5#
- 1...Qxb6
- 2.Rc4#
- 2.Qxd5#
- 1...Qa7
- 2.Rb5#
- 2.Qxd5#
- 1...Qa8
- 2.Se6#
- 2.Rb5#
- 1...Sc3
- 2.Se6#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 2.Qxd5#
- 1...Sf4
- 2.Qd4#
- 1...Qxb4!
- threat
- 1.Qf2+?
- 1...Sd4
- 2.Qxd4#
- 1...gxf2!
- 1...Sd4
- 1.exd5?
- threat
- 2.Rc4#
- 2.Qc6#
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5+
- 2.Rxb5#
- 1...Qxb6
- 2.Rc4#
- 2.Qxb6#
- 1...Qa6
- 2.Qc6#
- 1...Qa8
- 2.Rc4#
- 2.Rb5#
- 1...Bd6
- 2.Qxd6#
- 1...Sd4
- 2.Rc4#
- 2.Qxd4#
- 1...Qxb4!
- threat
- 1.b7?
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5+
- 2.Rxb5#
- 1...Bc6+
- 2.Qxc6#
- 1...Be6+
- 2.Sxe6#
- 1...Qxb4
- 2.Sa6#
- 1...Bxe4
- 2.Rc4#
- 1...Bxb7
- 2.Se6#
- 2.Rc4#
- 1...Bxf7
- 2.Qc6#
- 1...Qb6
- 2.Qxb6#
- 1...Qa6
- 2.Sxa6#
- 1...Qa7
- 2.Rb5#
- 1...Qa8
- 2.Rb5#
- 2.Qb6#
- 1...Ba2
- 2.Qc6#
- 1...Bb3
- 2.Qc6#
- 1...Bc4
- 2.Rxc4#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qe7#
- 2.Qd6#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 2.Qd6#
- 1...Sa2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...Qxc7+!
- 1...Qxa4+
- 1.Sxd5?
- Keys
- 1.h4!
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5+
- 2.Rxb5#
- 1...Bc6+
- 2.Qxc6#
- 1...Be6+
- 2.Sxe6#
- 1...Qxb4
- 2.Sa6#
- 1...Qxb6
- 2.Qxb6#
- 1...Bxe4
- 2.Rc4#
- 1...Bxf7
- 2.Qc6#
- 1...Qa6
- 2.Sxa6#
- 1...Qa7
- 2.Rb5#
- 1...Qa8
- 2.Rb5#
- 1...Ba2
- 2.Qc6#
- 1...Bb3
- 2.Qc6#
- 1...Bc4
- 2.Rxc4#
- 1...Bb7
- 2.Se6#
- 2.Rc4#
- 1...Ba8
- 2.Se6#
- 2.Rc4#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Qe7#
- 2.Qd6#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 2.Qd6#
- 1...Sa2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...Qxa4+
- 1.h4!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(d);N_GUARD,XR(F)::S(J)
- Q(d);OGATE,XP(H)::QAB1(I),XQ(d)
- Q(d);CHECK,XP(E)::S(A),XQ(d)
- Q(d);CHECK,N_GUARD::R1(F),XQ(d)
- Q(d);N_GUARD::S(J),XQ(d)
- Q(d);N_GUARD,P_PINS(J)::R1(F)
- Q(d);N_GUARD::R1(F)
- B(f);N_GUARD::QAR1(I)
- B(f);N_GUARD::R1(F),XB(f)
- B(f);N_GUARD,XP(G)::R1(F)
- B(f);CHECK,N_GUARD::QAR1(I),XB(f)
- B(f);CHECK,N_GUARD::S(J),XB(f)
- B(f);N_GUARD,XP(L)::QAR1(I)
- B(g);N_GUARD::QAB1(I),XB(g)
- B(g);N_GUARD::QAB(I),XB(g)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::QAB1(I)
- S(b);N_GUARD::QAB1(I),XS(b)
- Tries
- Try
- S(J);XB(f)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,XP(E)::S(A),XQ(d)
- Q(d);CHECK,N_GUARD::R1(F),XQ(d)
- Q(d);OGATE,XR(F)::P(C),XQ(d)
- Q(d);::QAR1(I)
- Refutation
- Q(d);CHECK
- Try
- Q(I);CHECK
- Refutation
- S(b);XQ(I)
- Try
- Q(I);P_PINB(f)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,XP(E)::S(A),XQ(d)
- Q(d);CHECK,N_GUARD::R1(F),XQ(d)
- S(b);N_GUARD::QAB1(I)
- Refutation
- Q(d);XR(F)
- Try
- Q(I);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::QAB1(I),XS(b)
- Refutation
- P(c);XQ(I)
- Try
- P(G);XB(f)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,XP(E)::S(A),XQ(d)
- Q(d);CHECK,N_GUARD::R1(F),XQ(d)
- Q(d);::QAR1(I)
- B(g);N_GUARD::QAB1(I),XB(g)
- Refutation
- Q(d);XR(F)
- Try
- P(H);
- Vars
- Q(d);CHECK,XP(E)::S(A),XQ(d)
- Q(d);CHECK,N_GUARD::R1(F),XQ(d)
- B(f);CHECK,N_GUARD::QAR1(I),XB(f)
- B(f);CHECK,N_GUARD::S(J),XB(f)
- Q(d);N_GUARD,XR(F)::S(J)
- B(f);N_GUARD,XP(G)::R1(F)
- B(f);N_GUARD,XP(L)::QAR1(I)
- Q(d);N_GUARD::QAB1(I),XQ(d)
- Q(d);N_GUARD::S(J),XQ(d)
- Q(d);N_GUARD::R1(F)
- B(f);N_GUARD::QAR1(I)
- B(f);N_GUARD::R1(F),XB(f)
- B(g);N_GUARD::QAB1(I),XB(g)
- B(g);N_GUARD::QAB(I),XB(g)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::QAB1(I)
- S(b);N_GUARD::QAB1(I),XS(b)
- Refutation
- Q(d);CHECK,XS(J)
- Try
- Actual
- P(D);
- Vars
- Q(d);CHECK,XP(E)::S(A),XQ(d)
- Q(d);CHECK,N_GUARD::R1(F),XQ(d)
- B(f);CHECK,N_GUARD::QAR1(I),XB(f)
- B(f);CHECK,N_GUARD::S(J),XB(f)
- Q(d);N_GUARD,XR(F)::S(J)
- Q(d);OGATE,XP(H)::QAB1(I),XQ(d)
- B(f);N_GUARD,XP(G)::R1(F)
- B(f);N_GUARD,XP(L)::QAR1(I)
- Q(d);N_GUARD::S(J),XQ(d)
- Q(d);N_GUARD,P_PINS(J)::R1(F)
- Q(d);N_GUARD::R1(F)
- B(f);N_GUARD::QAR1(I)
- B(f);N_GUARD::R1(F),XB(f)
- B(g);N_GUARD::QAB1(I),XB(g)
- B(g);N_GUARD::QAB(I),XB(g)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::QAB1(I)
- S(b);N_GUARD::QAB1(I),XS(b)
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).