MESON Chess Problem Database
Problem Display
PID: 194374 (3R4/B1n1NN1P/1r4pK/2bp2p1/2BknqR1/4pb1P/1PQ1p3/3r4 w - - 0 1)
Jansen, R
Probleemblad, 1979
#2
11 + 13
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Qc3#
- 1...Qg3
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 1...Qd6
- 2.Qc3#
- 1...Qf5
- 2.Qc3#
- 1...Qf6
- 2.Qc3#
- 1...Qxf7
- 2.Qc3#
- 1...Ra1
- 2.Qd3#
- 1...Rb1
- 2.Qd3#
- 1...Rc1
- 2.Qd3#
- 1...Re1
- 2.Qd3#
- 1...Rf1
- 2.Qd3#
- 1...Rg1
- 2.Qd3#
- 1...Rh1
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Rxb2
- 2.Sc6#
- 1...Rb3
- 2.Sc6#
- 1...Rb4
- 2.Sc6#
- 1...Rb5
- 2.Sc6#
- 1...Rc6
- 2.Sxc6#
- 1...Rb7
- 2.Sc6#
- 1...Rb8
- 2.Sc6#
- 1...Sd2
- 2.Qd3#
- 1...Sd6
- 2.h8Q#
- 2.h8B#
- 1...Sb5
- 2.Rxd5#
- 1...Sa6
- 2.Rxd5#
- 1...Se6
- 2.Rxd5#
- 1...Sa8
- 2.Rxd5#
- 1...Se8
- 2.Rxd5#
- 1...Qh2
- Tries
- 1.Sf5+?
- 1...Qxf5
- 2.Qc3#
- 1...gxf5+!
- 1...Qxf5
- 1.Bxe2?
- threat
- 2.Qc4#
- 1...Qxf7
- 2.Qc3#
- 1...Qd6
- 2.Qxd1#
- 2.Qc3#
- 1...Rc1
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Rb4
- 2.Sc6#
- 1...Rd6
- 2.Qa4#
- 1...Bd6
- 2.Sc6#
- 1...Sd2
- 2.Qd3#
- 1...Sc3
- 2.bxc3#
- 1...Sd6
- 2.h8Q#
- 2.h8B#
- 1...Bxe2!
- threat
- 1.Bxd5?
- threat
- 2.Qc4#
- 1...Qxf7
- 2.Qc3#
- 1...Sxd5
- 2.Rxd5#
- 1...Rb4
- 2.Sc6#
- 1...Sd2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 2.bxc3#
- 1...Sd6
- 2.Qc3#
- 2.h8Q#
- 2.h8B#
- 1...Rc1!
- threat
- 1.Ba6?
- threat
- 2.Qc4#
- 1...Qxf7
- 2.Qc3#
- 1...Sxa6
- 2.Rxd5#
- 1...Rc1
- 2.Qd3#
- 1...Qd6
- 2.Qc3#
- 1...Rb4
- 2.Sc6#
- 1...Rb5
- 2.Sc6#
- 1...Rd6
- 2.Qa4#
- 1...Bd6
- 2.Sc6#
- 1...Sd2
- 2.Qd3#
- 1...Sc3
- 2.bxc3#
- 1...Sd6
- 2.h8Q#
- 2.h8B#
- 1...Sb5
- 2.Rxd5#
- 1...Rxa6!
- threat
- 1.h8Q+?
- 1...Qe5
- 2.Qxe5#
- 2.Qc3#
- 1...Qf6
- 2.Qc3#
- 1...Rf6
- 2.Sc6#
- 1...Sf6!
- 1...Qe5
- 1.h8B+?
- 1...Qe5
- 2.Bxe5#
- 2.Qc3#
- 1...Qf6
- 2.Qc3#
- 1...Rf6
- 2.Sc6#
- 1...Sf6!
- 1...Qe5
- 1.Sf5+?
- Keys
- 1.Bb5!
- threat
- 2.Qc4#
- 1...Qxf7
- 2.Qc3#
- 1...Rxb5
- 2.Sc6#
- 1...Sxb5
- 2.Rxd5#
- 1...Rc1
- 2.Qd3#
- 1...Qd6
- 2.Qc3#
- 1...Rd6
- 2.Qa4#
- 1...Bd6
- 2.Sc6#
- 1...Sd2
- 2.Qd3#
- 1...Sc3
- 2.bxc3#
- 1...Sd6
- 2.h8Q#
- 2.h8B#
- threat
- 1.Bb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 22
- Sets
- Q(g);P_PINP(C),P_SPINS(f)::QAB1(B)
- Q(g);P_SPINS(f)::QAB1(B)
- Q(g);N_SPINP(i),P_SPINS(f)::QAB1(B)
- Q(g);P_SPINS(f),XS(I)::QAB1(B)
- R(a);N_GUARD::QAR1(B)
- R(a);N_GUARD,P_PINP(C)::QAR1(B)
- R(a);N_GUARD::QAR1(B),XR(a)
- R(k);N_GUARD,P_SPINB(h),XP(A)::S(H)
- R(k);N_GUARD,P_SPINB(h)::S(H)
- R(k);N_GUARD,P_SPINB(h)::S(H),XR(k)
- S(f);P_SPINQ(g),S_CUTR(a)::QAR1(B)
- S(f);N_GUARD,N_SPINP(i),P_SPINQ(g),S_CUTR(k)::P=Q
- S(m);N_GUARD::R1(K),XP(i)
- Tries
- Try
- S(H);CHECK
- Vars
- Q(g);P_SPINS(f),XS(H)::QAB1(B)
- Refutation
- P(l);CHECK,XS(H)
- Try
- B(D);XP(b)
- Threat
- QAR1(B)
- Vars
- Q(g);P_SPINS(f),XS(I)::QAB1(B)
- R(a);N_GUARD::QAR1(B)
- R(a);N_GUARD::QAR1(B),XR(a)
- R(k);N_GUARD,P_SPINB(h)::S(H)
- R(k);N_GUARD,N_SPINP(i),P_SPINB(h)::QAR(B)
- B(h);N_SPINP(i),P_SPINR(k)::S(H)
- S(f);P_SPINQ(g),S_CUTR(a)::QAR1(B)
- S(f);OGATE,P_SPINQ(g)::P(A),XS(f)
- S(f);N_GUARD,N_SPINP(i),P_SPINQ(g),S_CUTR(k)::P=Q
- Refutation
- B(d);XB(D)
- Try
- B(D);XP(i)
- Threat
- QAR1(B)
- Vars
- Q(g);P_SPINS(f),XS(I)::QAB1(B)
- S(m);OGATE,P_SPINS(m),XB(D)::R1(K),XS(m)
- R(k);N_GUARD,P_SPINB(h)::S(H)
- S(f);N_GUARD,P_SPINQ(g)::QAB1(B)
- Refutation
- R(a);
- Try
- B(D);
- Threat
- QAR1(B)
- Vars
- Q(g);P_SPINS(f),XS(I)::QAB1(B)
- S(m);N_GUARD,XB(D)::R1(K),XP(i)
- R(a);N_GUARD::QAR1(B)
- Q(g);N_SPINP(i),P_SPINS(f)::QAB1(B)
- R(k);N_GUARD,P_SPINB(h)::S(H)
- R(k);N_GUARD,N_SPINP(i),P_SPINB(h)::QAR(B)
- B(h);N_SPINP(i),P_SPINR(k)::S(H)
- S(f);P_SPINQ(g),S_CUTR(a)::QAR1(B)
- S(f);OGATE,P_SPINQ(g)::P(A),XS(f)
- S(f);N_GUARD,N_SPINP(i),P_SPINQ(g),S_CUTR(k)::P=Q
- S(m);N_GUARD::R1(K),XP(i)
- Refutation
- R(k);P_SPINB(h),XB(D)
- Try
- P(J);CHECK
- Vars
- Q(g);P_SPINQ(g),P_SPINS(f)::QAB1(B)
- R(k);P_SPINB(h),P_SPINR(k)::S(H)
- Refutation
- S(f);P_SPINQ(g),P_SPINS(f)
- Try
- P(J);CHECK
- Vars
- Q(g);P_SPINQ(g),P_SPINS(f)::QAB1(B)
- R(k);P_SPINB(h),P_SPINR(k)::S(H)
- Refutation
- S(f);P_SPINQ(g),P_SPINS(f)
- Try
- Actual
- B(D);
- Threat
- QAR1(B)
- Vars
- Q(g);P_SPINS(f),XS(I)::QAB1(B)
- R(k);N_GUARD,P_SPINB(h),XB(D)::S(H)
- S(m);N_GUARD,XB(D)::R1(K),XP(i)
- R(a);N_GUARD::QAR1(B)
- Q(g);N_SPINP(i),P_SPINS(f)::QAB1(B)
- R(k);N_SPINP(i),P_SPINB(h)::QAR(B)
- B(h);N_SPINP(i),P_SPINR(k)::S(H)
- S(f);P_SPINQ(g),S_CUTR(a)::QAR1(B)
- S(f);OGATE,P_SPINQ(g)::P(A),XS(f)
- S(f);N_GUARD,N_SPINP(i),P_SPINQ(g),S_CUTR(k)::P=Q
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).