MESON Chess Problem Database
Problem Display
PID: 173667 (3b4/4PPQ1/2PR1Kp1/2pP2Np/2pkbnRq/r7/B2P1r2/2n1N1B1 w - - 0 1)
Boros, Sandor
L'Alfiere di Re, 1925
#2
13 + 12
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxg5+
- 2.Kxg5#
- 1...Rd3
- 2.Sc2#
- 1...Bd3
- 2.Sf3#
- 1...Bxe7+
- 2.Kxe7#
- 1...Scd3
- 2.Sc2#
- 1...Se2+
- 2.Ke6#
- 1...Sg2+
- 2.Ke6#
- 1...Sfd3+
- 2.Sf3#
- 1...Sh3+
- 2.Ke6#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Qxg5+
- Tries
- 1.Bxf2+?
- 1...Re3
- 2.Bxe3#
- 1...Qxf2!
- 1...Re3
- 1.exd8Q?
- threat
- 2.Ke7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Sfd3+
- 2.Sf3#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Ra7!
- threat
- 1.exd8S?
- threat
- 2.Ke7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Sfd3+
- 2.Sf3#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Ra7!
- threat
- 1.exd8B?
- threat
- 2.Ke7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Sfd3+
- 2.Sf3#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Ra7!
- threat
- 1.exd8R?
- threat
- 2.Ke7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Sfd3+
- 2.Sf3#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Ra7!
- threat
- 1.f8Q?
- threat
- 2.Kf7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Bxe7+
- 2.Kxe7#
- 1...Sfe2+
- 2.Ke6#
- 1...Sg2+
- 2.Ke6#
- 1...Sfd3+
- 2.Sf3#
- 1...Sh3+
- 2.Ke6#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Bxd5!
- threat
- 1.f8B?
- threat
- 2.Kf7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Bxe7+
- 2.Kxe7#
- 1...Sfe2+
- 2.Ke6#
- 1...Sg2+
- 2.Ke6#
- 1...Sfd3+
- 2.Sf3#
- 1...Sh3+
- 2.Ke6#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Bxd5!
- threat
- 1.f8R?
- threat
- 2.Kf7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Bxe7+
- 2.Kxe7#
- 1...Sfe2+
- 2.Ke6#
- 1...Sg2+
- 2.Ke6#
- 1...Sfd3+
- 2.Sf3#
- 1...Sh3+
- 2.Ke6#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Scd3
- 2.Sc2#
- 1...Bxd5!
- threat
- 1.Bxf2+?
- Keys
- 1.f8S!
- threat
- 2.Kf7#
- 1...Qxg5+
- 2.Kxg5#
- 1...Bxe7+
- 2.Kxe7#
- 1...Sfe2+
- 2.Ke6#
- 1...Sg2+
- 2.Ke6#
- 1...Sfd3+
- 2.Sf3#
- 1...Sh3+
- 2.Ke6#
- 1...Sxd5+
- 2.Ke6#
- 1...Se6+
- 2.Kxe6#
- 1...Bxd5
- 2.Se6#
- 1...Scd3
- 2.Sc2#
- threat
- 1.f8S!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- R(c);SBLOCK,S_CUTB(f)::S(A)
- B(f);N_GUARD,P_SPINS(g),SBLOCK,S_CUTR(c)::S(A)
- B(l);CHECK,XP(K)::QAB(M)+K(J),XB(l)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- Tries
- Try
- B(B);CHECK,XR(b)
- Vars
- R(c);N_GUARD,P_SPINR(c)::B(B),XR(c)
- Refutation
- Q(h);N_PINS(G),XB(B)
- Try
- P(K);N_SPINP(K),XB(l)
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- R(c);
- Try
- P(K);N_SPINP(K),XB(l)
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- R(c);
- Try
- P(K);N_SPINP(K),XB(l)
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- R(c);
- Try
- P(K);N_SPINP(K),XB(l)
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- R(c);
- Try
- P(L);
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- B(l);CHECK,XP(K)::QAB(M)+K(J),XB(l)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- B(f);P_SPINB(f),P_SPINS(g),XP(F)
- Try
- P(L);
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- B(l);CHECK,XP(K)::QAB(M)+K(J),XB(l)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- B(f);P_SPINB(f),P_SPINS(g),XP(F)
- Try
- P(L);
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- B(l);CHECK,XP(K)::QAB(M)+K(J),XB(l)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- S(a);SBLOCK,S_CUTB(f)::S(A)
- Refutation
- B(f);P_SPINB(f),P_SPINS(g),XP(F)
- Try
- Actual
- P(L);
- Threat
- QAB(M)+K(J)
- Vars
- Q(h);CHECK,XS(G)::QAB(M)+K(J),XQ(h)
- B(l);CHECK,XP(K)::QAB(M)+K(J),XB(l)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f),SBLOCK,S_CUTR(c)::S(A)
- S(g);CHECK,P_SPINB(f),P_SPINS(g),XP(F)::QAB(M)+K(J)
- S(g);CHECK,P_SPINB(f)::QAB(M)+K(J),XS(g)
- B(f);P_SPINB(f),P_SPINS(g),XP(F)::S(L)
- S(a);SBLOCK,S_CUTB(f)::S(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).