MESON Chess Problem Database
Problem Display
PID: 204415 (2N2RnK/4p3/4p2N/R2qkBp1/8/4BPp1/p5rn/bb2Q3 w - - 0 1)
Wrobel, Marian
L'Alfiere di Re, 1925
#2
9 + 12
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxa5
- 2.Qxa5#
- 1...Qb5
- 2.Rxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Rb2
- 2.Qc3#
- 2.Qxg3#
- 1...Rc2
- 2.Qxg3#
- 1...Rd2
- 2.Qxg3#
- 1...Re2
- 2.Qxg3#
- 1...Bc3
- 2.Qxc3#
- 1...Bc2
- 2.Qxa1#
- 1...Sf1
- 2.Sg4#
- 1...Sxf3
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...g4
- 2.f4#
- 1...Qxa5
- Tries
- 1.Bg1+?
- 1...Re2
- 2.Qxg3#
- 1...Be4
- 2.Qxe4#
- 1...Kf4+!
- 1...Re2
- 1.Bf2+?
- 1...Be4
- 2.Qxe4#
- 1...Kf4+!
- 1...Be4
- 1.Bd4+?
- 1...Kf4
- 2.Qe3#
- 1...Kxd4!
- 1...Kf4
- 1.Bb6+?
- 1...Re2
- 2.Qxg3#
- 1...Be4
- 2.Qxe4#
- 1...Kf4+!
- 1...Re2
- 1.Ba7+?
- 1...Re2
- 2.Qxg3#
- 1...Be4
- 2.Qxe4#
- 1...Kf4+!
- 1...Re2
- 1.Bd3?
- threat
- 2.Bf2#
- 1...Qxa5
- 2.Qxa5#
- 1...Sxf3
- 2.Sg4#
- 1...Qb5
- 2.Rxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Re2
- 2.Qxg3#
- 1...Rg1
- 2.Bxg1#
- 1...Rb2
- 2.Qc3#
- 2.Qxg3#
- 1...Rc2
- 2.Qxg3#
- 1...Rd2
- 2.Qxg3#
- 1...Rf2
- 2.Bxf2#
- 1...Bc3
- 2.Qxc3#
- 1...Bd4
- 2.Bf4#
- 1...Sf1
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...Sf6
- 2.Sf7#
- 1...Bxd3!
- threat
- 1.Qb4?
- threat
- 2.Qb8#
- 1...Qxa5
- 2.Qxa5#
- 1...Qb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Qc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Rb2
- 2.Qc3#
- 2.Qd4#
- 1...Rc2
- 2.Qe4#
- 1...exf5!
- threat
- 1.Bg1+?
- Keys
- 1.Bc2!
- threat
- 2.Bf2#
- 1...Qxa5
- 2.Qxa5#
- 1...Rxc2
- 2.Qxg3#
- 1...Bxc2
- 2.Qxa1#
- 1...Sxf3
- 2.Sg4#
- 1...Qb5
- 2.Rxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Re2
- 2.Qxg3#
- 1...Rg1
- 2.Bxg1#
- 1...Rd2
- 2.Qxg3#
- 1...Rf2
- 2.Bxf2#
- 1...Bc3
- 2.Qxc3#
- 1...Bd4
- 2.Bf4#
- 1...Sf1
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...Sf6
- 2.Sf7#
- threat
- 1.Bc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(g);N_SPINQ(g),OGATE,XR(D)::QAR(A),XQ(g)
- Q(g);OGATEB::R(D),XQ(g)
- R(d);N_GUARD::QAB(A),XP(f)
- B(a);N_GUARD::QAB(A),XB(a)
- B(b);OGATE::QAB(A),XB(a)
- S(e);N_GUARD::S(F)
- S(e);N_GUARD,XP(C)::S(F)
- S(e);N_GUARD::S(F),XS(e)
- P(i);N_GUARD::P(C)
- Tries
- Try
- B(B);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAB(A),XP(f)
- B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
- Refutation
- K(h);CHECK,N_SPINQ(g),S_FLIGHT
- Try
- B(B);CHECK
- Vars
- B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
- Refutation
- K(h);CHECK,N_SPINQ(g),S_FLIGHT
- Try
- B(B);CHECK
- Vars
- K(h);N_SPINQ(g),P_PINB(B),S_FLIGHT::QAB1(A)
- Refutation
- K(h);N_SPINQ(g),S_FLIGHT,XB(B)
- Try
- B(B);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAB(A),XP(f)
- B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
- Refutation
- K(h);CHECK,N_SPINQ(g),S_FLIGHT
- Try
- B(B);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAB(A),XP(f)
- B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
- Refutation
- K(h);CHECK,N_SPINQ(g),S_FLIGHT
- Try
- B(E);
- Threat
- QAR(A)+B(B)
- Vars
- Q(g);N_SPINQ(g),OGATE,XR(D)::QAR(A),XQ(g)
- S(e);N_GUARD,XP(C)::S(F)
- Q(g);OGATEB::R(D),XQ(g)
- R(d);N_GUARD::QAB(A),XP(f)
- R(d);N_GUARD::QAR(A)+B(B),XR(d)
- R(d);::QAR(A)+B(B),XR(d)
- B(a);N_GUARD::QAB(A),XB(a)
- B(a);SBLOCK::QAR(A)+B(B),DCHECK
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
- S(l);SBLOCK::S(F)
- Refutation
- B(b);XB(E)
- Try
- Q(A);
- Threat
- QAB(A)
- Vars
- Q(g);N_SPINQ(g),OGATE,XR(D)::QAR(A),XQ(g)
- R(d);S_CUTB(b)::QAR1(A)
- Refutation
- P(j);XB(E)
- Try
- Actual
- B(E);
- Threat
- QAR(A)+B(B)
- Vars
- Q(g);N_SPINQ(g),OGATE,XR(D)::QAR(A),XQ(g)
- R(d);N_GUARD,XB(E)::QAB(A),XP(f)
- B(b);OGATE,XB(E)::QAB(A),XB(a)
- S(e);N_GUARD,XP(C)::S(F)
- Q(g);OGATEB::R(D),XQ(g)
- R(d);N_GUARD::QAB(A),XP(f)
- R(d);N_GUARD::QAR(A)+B(B),XR(d)
- R(d);::QAR(A)+B(B),XR(d)
- B(a);N_GUARD::QAB(A),XB(a)
- B(a);SBLOCK::QAR(A)+B(B),DCHECK
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
- S(l);SBLOCK::S(F)
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).