MESON Chess Problem Database
Problem Display
PID: 198706 (1b6/4Bp2/6BK/Q5p1/2pknqR1/4N3/3NPP1p/2r4b w - - 0 1)
Ellerman, Arnoldo
L'Alfiere di Re, 1921
#2
9 + 10
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Sf5#
- 1...Qd6
- 2.Sf5#
- 1...Qc7
- 2.Sf5#
- 1...Qf5
- 2.Sxf5#
- 1...Ra1
- 2.Sc2#
- 1...Rb1
- 2.Sc2#
- 1...Rd1
- 2.Sc2#
- 1...Re1
- 2.Sc2#
- 1...Rf1
- 2.Sc2#
- 1...Rg1
- 2.Sc2#
- 1...Rc2
- 2.Sxc2#
- 1...Rc3
- 2.Qd5#
- 1...Sxf2
- 2.Sf5#
- 1...Sc3
- 2.Sf5#
- 2.Qc5#
- 1...Sd6
- 2.Bf6#
- 1...Sf6
- 2.Sf5#
- 1...c3
- 2.Sb3#
- 2.Qd5#
- 1...Qg3
- Tries
- 1.Sxe4?
- threat
- 2.Qc5#
- 2.Qd5#
- 1...Qxe3
- 2.Qc5#
- 1...Qxf2
- 2.Qc5#
- 1...Qxe4
- 2.Sf5#
- 1...fxg6
- 2.Qd5#
- 1...f5
- 2.Qd5#
- 1...Qe5
- 2.Qd2#
- 1...Qd6
- 2.Sf5#
- 1...Qc7
- 2.Sf5#
- 2.Qd5#
- 1...Qf5
- 2.Sxf5#
- 1...Bd6
- 2.Qd5#
- 1...Ba7
- 2.Qd5#
- 1...Bxe4!
- threat
- 1.Bb4?
- threat
- 2.Qd5#
- 1...Qxe3
- 2.Qc5#
- 1...Qxf2
- 2.Qc5#
- 1...Sxd2
- 2.Qc5#
- 1...Sxf2
- 2.Sf5#
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Qd6
- 2.Sf5#
- 1...Qf5
- 2.Sxf5#
- 1...Sc3
- 2.Sf5#
- 2.Qc5#
- 1...Sg3
- 2.Qc5#
- 1...Sd6
- 2.Qc5#
- 1...Sf6
- 2.Sf5#
- 2.Qc5#
- 1...Qe5!
- threat
- 1.Rxf4?
- threat
- 2.Sf5#
- 1...f5
- 2.Sxf5#
- 1...fxg6!
- threat
- 1.Sxe4?
- Keys
- 1.Sb1!
- threat
- 2.Qd5#
- 1...Qxe3
- 2.Qc5#
- 1...Qxf2
- 2.Qc5#
- 1...Rxb1
- 2.Sc2#
- 1...Sxf2
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Qe5
- 2.Qd2#
- 1...Qd6
- 2.Sf5#
- 1...Qf5
- 2.Sxf5#
- 1...Sd2
- 2.Qc5#
- 1...Sc3
- 2.Qc5#
- 1...Sg3
- 2.Qc5#
- 1...Sd6
- 2.Bf6#
- 1...Sf6
- 2.Qc5#
- threat
- 1.Sb1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 7
- REMOVED MATES = 9
- Sets
- Q(g);N_GUARD,P_SPINS(f)::S(D)
- Q(g);N_GUARD,P_PINB(G),P_SPINS(f)::S(D)
- Q(g);N_GUARD,P_SPINS(f)::S(D),XQ(g)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- R(a);SBLOCK::QAR1(F)
- S(f);P_SPINQ(g),XP(C)::S(D)
- S(f);N_GUARD,P_SPINQ(g),S_CUTB(j)::B(I)
- S(f);P_SPINQ(g)::S(D)
- Tries
- Try
- S(A);XS(f)
- Threat
- DUALS(2)
- Vars
- Q(g);XS(D)::QAB1(F)
- Q(g);XP(C)::QAB1(F)
- Q(g);N_GUARD,P_SPINQ(g),XS(A)::S(D)
- P(i);XB(G)::QAR1(F)
- P(i);::QAR1(F)
- Q(g);SBLOCK::QAR2(F)
- Q(g);N_GUARD,P_PINB(G)::S(D)
- Q(g);N_GUARD::S(D),XQ(g)
- B(j);::QAR1(F)
- Refutation
- B(b);XS(A)
- Try
- B(I);
- Threat
- QAR1(F)
- Vars
- Q(g);P_SPINS(f),XS(D)::QAB1(F)
- Q(g);P_SPINS(f),XP(C)::QAB1(F)
- S(f);N_GUARD,P_SPINQ(g),XS(A)::QAB1(F)
- S(f);N_GUARD,P_SPINQ(g)::QAB1(F),XS(f)
- Q(g);N_GUARD,P_PINB(G),P_SPINS(f)::S(D)
- Q(g);N_GUARD,P_SPINS(f)::S(D),XQ(g)
- S(f);N_GUARD,P_SPINQ(g)::QAB1(F)
- Refutation
- Q(g);P_SPINS(f)
- Try
- R(E);P_PINS(f),XQ(g)
- Threat
- S(D)
- Vars
- P(i);::S(D),XP(i)
- Refutation
- P(i);XB(G)
- Try
- Actual
- S(A);
- Threat
- QAR1(F)
- Vars
- Q(g);P_SPINS(f),XS(D)::QAB1(F)
- Q(g);P_SPINS(f),XP(C)::QAB1(F)
- R(a);N_GUARD,XS(A)::S(D)
- S(f);N_GUARD,P_SPINQ(g),XP(C)::QAB1(F)
- S(f);N_GUARD,P_SPINQ(g)::QAB1(F),XS(f)
- Q(g);P_SPINS(f),SBLOCK::QAR2(F)
- Q(g);N_GUARD,P_PINB(G),P_SPINS(f)::S(D)
- Q(g);N_GUARD,P_SPINS(f)::S(D),XQ(g)
- S(f);N_GUARD,P_SPINQ(g)::QAB1(F)
- S(f);N_GUARD,P_SPINQ(g),S_CUTB(j)::B(I)
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).