MESON Chess Problem Database
Problem Display
PID: 258090 (B7/3NN3/2PQKp2/3p4/rRqbkpn1/3b2rR/2PPP3/B7 w - - 0 1)
Santiago, Joao Baptista
Probleemblad, 1948
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Sc5#
- 1...Qb3
- 2.Sc5#
- 1...Qa6
- 2.Sc5#
- 2.Qxd5#
- 1...Qxc2
- 2.Qxd5#
- 1...Qc3
- 2.Qxd5#
- 1...Qxb4
- 2.Qxd5#
- 1...Qc5
- 2.Sxc5#
- 1...Rf3
- 2.exf3#
- 1...Bxa1
- 2.Qxd5#
- 1...Bg1
- 2.Qxd5#
- 1...Bb2
- 2.Qxd5#
- 1...Bf2
- 2.Qxd5#
- 1...Bc3
- 2.Qxd5#
- 1...Be3
- 2.Qxd5#
- 2.cxd3#
- 1...Bc5
- 2.Sxc5#
- 2.Qxd5#
- 1...Be5
- 2.Sc5#
- 2.Qxd5#
- 1...Bb6
- 2.Qxd5#
- 1...Ba7
- 2.Qxd5#
- 1...Se5
- 2.Sxf6#
- 1...Qa2
- Tries
- 1.Sc5+?
- 1...Bxc5
- 2.Qxd5#
- 1...Qxc5!
- 1...Bxc5
- 1.Sxf6+?
- 1...Bxf6
- 2.Qxd5#
- 1...Sxf6!
- 1...Bxf6
- 1.Sg6?
- threat
- 2.Qxf4#
- 1...Rf3
- 2.exf3#
- 1...Be3
- 2.Qxd5#
- 2.cxd3#
- 1...Be5
- 2.Sc5#
- 2.Qxd5#
- 1...Se5
- 2.Sxf6#
- 1...f3
- 2.Qf4#
- 1...Qxc6!
- threat
- 1.Rxc4?
- threat
- 2.Sc5#
- 2.Qxd5#
- 1...Rxc4
- 2.Qxd5#
- 1...Bxe2
- 2.Qxd5#
- 1...dxc4
- 2.Qxd4#
- 2.Qd5#
- 1...Ra5
- 2.Rxd4#
- 1...Se3
- 2.Sc5#
- 2.Sxf6#
- 2.cxd3#
- 1...f3
- 2.Sc5#
- 2.cxd3#
- 2.exd3#
- 1...Bxc4!
- threat
- 1.Qe5+?
- 1...Bxe5
- 2.Sc5#
- 1...Sxe5
- 2.Sxf6#
- 1...fxe5!
- 1...Bxe5
- 1.cxd3+?
- 1...Qxd3
- 2.Sc5#
- 2.Qxd5#
- 1...Rxd3!
- 1...Qxd3
- 1.Sc5+?
- Keys
- 1.Sxd5!
- threat
- 2.Qxf4#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qxc6
- 2.Sc3#
- 1...Rf3
- 2.exf3#
- 1...Be3
- 2.cxd3#
- 1...Be5
- 2.Sc5#
- 1...Se5
- 2.Sxf6#
- 1...f3
- 2.Qf4#
- threat
- 1.Sxd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 13
- Sets
- Q(d);N_GUARD,P_SPINB(e)::S(J)
- Q(d);N_GUARD,P_SPINB(e),XP(B)::QAB1(H),XP(i)
- Q(d);N_GUARD,P_SPINB(e)::QAB1(H),XP(i)
- Q(d);N_GUARD,XR(F)::QAB1(H),XP(i)
- Q(d);N_GUARD,P_SPINB(e)::S(J),XQ(d)
- R(b);OGATE::P(D),XR(b)
- B(e);P_SPINQ(d),XB(A)::QAB1(H),XP(i)
- B(e);P_SPINQ(d)::QAB1(H),XP(i)
- S(h);N_GUARD,S_CUTB(e)::S(J),XP(j)
- Tries
- Try
- S(J);CHECK
- Vars
- B(e);P_SPINQ(d),XS(J)::QAB1(H),XP(i)
- Refutation
- Q(d);P_SPINB(e),XS(J)
- Try
- S(J);CHECK,XP(j)
- Vars
- B(e);P_SPINQ(d),XS(J)::QAB1(H),XP(i)
- Refutation
- S(h);XS(J)
- Try
- S(K);
- Threat
- QAR1(H),XP(g)
- Vars
- R(b);OGATE::P(D),XR(b)
- S(h);N_GUARD,S_CUTB(e)::S(J),XP(j)
- P(g);::QAR1(H)
- Refutation
- Q(d);P_PINQ(H),P_SPINB(e),XP(G)
- Try
- R(F);P_PINB(e),XQ(d)
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINB(e),XR(F)::QAB1(H),XP(i)
- B(a);XP(D)::QAB1(H),XP(i)
- R(c);N_GUARD::R1(F),XB(e)
- Refutation
- B(a);N_SPINB(e),XR(F)
- Try
- Q(H);CHECK
- Vars
- B(e);P_SPINQ(d),XQ(H)::S(J)
- S(h);XQ(H)::S(J),XP(j)
- Refutation
- P(j);XQ(H)
- Try
- P(B);CHECK,XB(a)
- Refutation
- R(b);XP(B)
- Try
- Actual
- S(K);P_SPINS(K),XP(i)
- Threat
- QAR1(H),XP(g)
- Vars
- Q(d);CHECK,OGATE,P_SPINB(e),XS(K)::QAB1(H),XQ(d)
- Q(d);N_PINS(K),P_PINQ(H),P_SPINB(e),XP(G)::S(K)
- R(b);OGATE::P(D),XR(b)
- B(e);P_SPINQ(d),S_CUTR(b)::P(B),XB(a)
- B(e);N_GUARD,P_SPINQ(d)::S(J)
- S(h);N_GUARD,S_CUTB(e)::S(J),XP(j)
- P(g);::QAR1(H)
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).