MESON Chess Problem Database
Problem Display
PID: 249002 (7q/2pnQ3/2p2NN1/p4RBb/2Bkp2r/2R2p2/1PK4b/3n4 w - - 0 1)
Petite, Efren
The Problemist, 1990
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Rh3
- 2.Qxe4#
- 1...Rf4
- 2.Qxd7#
- 1...Bg1
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Bg4
- 2.Qxe4#
- 1...Sxb2
- 2.Be3#
- 1...Sf2
- 2.Be3#
- 1...Se3+
- 2.Bxe3#
- 1...Sc5
- 2.Qxc5#
- 1...Sb6
- 2.Qc5#
- 1...Sxf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...c5
- 2.Rd5#
- 1...Rh3
- Tries
- 1.Bf1?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Qg8!
- threat
- 1.Ba2?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Qg8!
- threat
- 1.Bb3?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Qg8!
- threat
- 1.Bb5?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...cxb5
- 2.Rd5#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Qg8!
- threat
- 1.Bd5?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...cxd5
- 2.Rxd5#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Rf4!
- threat
- 1.Ba6?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Qg8!
- threat
- 1.Be6?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Bf4!
- threat
- 1.Bg8?
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Qxg8!
- threat
- 1.Rd3+?
- 1...Kxc4
- 2.b3#
- 1...exd3+!
- 1...Kxc4
- 1.Bf1?
- Keys
- 1.Bf7!
- threat
- 2.Rc4#
- 1...Se3+
- 2.Bxe3#
- 1...Sxb2
- 2.Be3#
- 1...Sxc3
- 2.bxc3#
- 1...Rf4
- 2.Qxd7#
- 1...Bf4
- 2.Qxe4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- threat
- 1.Bf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- R(f);N_GUARD::QAR1(I),XP(e)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);N_GUARD::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- B(h);S_CUTR(f)::QAR1(I),XP(e)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);N_GUARD::B(F)
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(k);N_GUARD::QAB1(I),XS(k)
- S(k);N_GUARD::QAB1(I)
- S(k);N_GUARD,XS(G)::QAB1(I)
- P(i);N_GUARD::R1(E)
- Tries
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- Q(l);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- Q(l);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- Q(l);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- P(i);N_GUARD,XB(D)::R1(E)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- Q(l);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- P(i);OGATE,XB(D)::R1(E),XP(i)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- R(f);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- Q(l);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- S(k);N_GUARD::QAB1(I)
- Refutation
- B(b);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(I)
- Refutation
- Q(l);XB(D)
- Try
- R(C);CHECK
- Vars
- K(d);P-FLIGHT,XB(D)::P(A)
- Refutation
- P(e);CHECK,XR(C)
- Try
- Actual
- B(D);
- Threat
- R1(C)
- Vars
- S(a);CHECK,N_GUARD::B(F),XS(a)
- S(a);N_GUARD,XP(A)::B(F)
- S(a);OGATE,XR(C)::P(A),XS(a)
- R(f);S_CUTB(b)::QAR(I),XS(k)
- B(b);S_CUTR(f)::QAR1(I),XP(e)
- S(k);N_GUARD::QAB1(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).