MESON Chess Problem Database
Problem Display
PID: 117016 (3b4/1nqP4/2n1B3/2PN2P1/4kPR1/3p2K1/4r1N1/B3Q3 w - - 0 1)
Knuppert, Hugo
Keystip Ty, 1974
#2
11 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxf4+
- 2.Rxf4#
- 1...Qa5
- 2.f5#
- 1...Qe5
- 2.fxe5#
- 1...Qb6
- 2.f5#
- 1...Qxd7
- 2.f5#
- 1...Qc8
- 2.f5#
- 1...Re3+
- 2.Qxe3#
- 1...Bf6
- 2.Sxf6#
- 1...Sb4
- 2.Qxb4#
- 1...Sd4
- 2.Sc3#
- 1...Se5
- 2.fxe5#
- 1...Sa7
- 2.Qb4#
- 1...Se7
- 2.Sf6#
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Sd6
- 2.f5#
- 1...d2
- 2.Qb1#
- 2.Qxe2#
- 1...Qxf4+
- Tries
- 1.Sge3?
- threat
- 2.Bf5#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rg2+
- 2.Sxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Qxd7
- 2.f5#
- 1...Rb2
- 2.Sc2#
- 1...Qe5
- 2.fxe5#
- 1...Se7
- 2.Qb4#
- 1...Sd6
- 2.f5#
- 1...Sd4!
- threat
- 1.Se7?
- threat
- 2.Bd5#
- 2.Bf5#
- 1...Qxf4+
- 2.Rxf4#
- 1...Re3+
- 2.Qxe3#
- 1...Qxd7
- 2.f5#
- 1...Sxe7
- 2.Qb4#
- 1...d2
- 2.Bf5#
- 2.Qb1#
- 2.Qxe2#
- 1...Sd4
- 2.Bd5#
- 1...Qe5
- 2.fxe5#
- 1...Qd6
- 2.Bf5#
- 1...Sb4
- 2.Bf5#
- 2.Qxb4#
- 1...Sd6
- 2.Bd5#
- 2.f5#
- 1...Bxe7!
- threat
- 1.Bf6?
- threat
- 2.Sc3#
- 1...Qxf4+
- 2.Rxf4#
- 1...Re3+
- 2.Qxe3#
- 1...Qe5
- 2.fxe5#
- 1...Se5
- 2.fxe5#
- 1...d2
- 2.Qb1#
- 2.Qxe2#
- 1...Qa5
- 2.f5#
- 1...Bxf6!
- threat
- 1.Bg7?
- threat
- 2.Sc3#
- 1...Qxf4+
- 2.Rxf4#
- 1...Re3+
- 2.Qxe3#
- 1...Qe5
- 2.fxe5#
- 1...Se5
- 2.fxe5#
- 1...d2
- 2.Qb1#
- 2.Qxe2#
- 1...Qa5
- 2.f5#
- 1...Bf6!
- threat
- 1.Bh8?
- threat
- 2.Sc3#
- 1...Qxf4+
- 2.Rxf4#
- 1...Re3+
- 2.Qxe3#
- 1...Qe5
- 2.fxe5#
- 1...Se5
- 2.fxe5#
- 1...d2
- 2.Qb1#
- 2.Qxe2#
- 1...Qa5
- 2.f5#
- 1...Bf6!
- threat
- 1.Qf2?
- threat
- 2.Sc3#
- 2.Qf3#
- 1...Qxf4+
- 2.Rxf4#
- 2.Qxf4#
- 1...Re3+
- 2.Qxe3#
- 1...d2
- 2.Qxe2#
- 2.Qf3#
- 1...Sd4
- 2.Sc3#
- 2.Qxd4#
- 1...Qa5
- 2.Qf3#
- 2.f5#
- 1...Qe5
- 2.Qf3#
- 2.fxe5#
- 1...Rb2
- 2.Sc3#
- 2.Qe3#
- 1...Rc2
- 2.Qe3#
- 2.Qf3#
- 1...Bf6
- 2.Sxf6#
- 2.Qf3#
- 1...Se5
- 2.Sc3#
- 2.Qd4#
- 2.fxe5#
- 1...Rxf2!
- threat
- 1.Qb4+?
- 1...Sd4
- 2.Sc3#
- 2.Qxd4#
- 1...Sxb4!
- 1...Sd4
- 1.Qg1?
- threat
- 2.Sc3#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rxg2+
- 2.Qxg2#
- 1...Re3+
- 2.Qxe3#
- 1...d2
- 2.Qb1#
- 1...Qa5
- 2.f5#
- 1...Qe5
- 2.fxe5#
- 1...Rc2
- 2.Qe3#
- 1...Bf6
- 2.Sxf6#
- 1...Rf2!
- threat
- 1.Qh1?
- threat
- 2.Qh7#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rxg2+
- 2.Qxg2#
- 1...Re3+
- 2.Sgxe3#
- 1...Qxd7
- 2.f5#
- 1...Sd4
- 2.Sc3#
- 1...Qe5
- 2.fxe5#
- 1...Se5
- 2.fxe5#
- 1...Se7
- 2.Sf6#
- 1...Sd6
- 2.f5#
- 1...Rb2!
- threat
- 1.Sge3?
- Keys
- 1.Sde3!
- threat
- 2.Bd5#
- 2.Bf5#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rxg2+
- 2.Sxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Qxd7
- 2.f5#
- 1...Rb2
- 2.Sc2#
- 1...d2
- 2.Bf5#
- 2.Qb1#
- 1...Qe5
- 2.fxe5#
- 1...Qd6
- 2.Bf5#
- 1...Sb4
- 2.Bf5#
- 2.Qxb4#
- 1...Sd4
- 2.Bd5#
- 1...Se7
- 2.Qb4#
- 1...Sd6
- 2.Bd5#
- 2.f5#
- threat
- 1.Sde3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 9
- Sets
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- Q(f);N_PINP(E)::R(F)+P(E)
- Q(f);::R(F)+P(E),XQ(f)
- Q(f);N_PINP(E),XP(K)::R(F)+P(E)
- R(a);CHECK,OGATE::QAR1(B),XR(a)
- B(g);N_GUARD::S(H),XB(g)
- S(d);N_GUARD::QAR(B),XS(d)
- S(d);SBLOCK::S(H)
- S(d);N_PINP(E)::R(F)+P(E),XS(d)
- S(d);N_GUARD::QAR(B)
- S(e);N_PINP(E)::R(F)+P(E)
- Tries
- Try
- S(C);N_PINR(a)
- Threat
- B(J)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK::QAR(B)+S(C),XR(a)
- R(a);CHECK,OGATE,P_SPINR(a),XS(C)::QAR1(B),XR(a)
- Q(f);N_PINP(E),XP(K)::R(F)+P(E)
- R(a);::QAR(B)+S(C)
- Q(f);::R(F)+P(E),XQ(f)
- S(d);N_GUARD::QAR(B)
- S(e);N_PINP(E)::R(F)+P(E)
- Refutation
- S(d);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,OGATE::QAR1(B),XR(a)
- Q(f);N_PINP(E),XP(K)::R(F)+P(E)
- S(d);N_GUARD,XS(H)::QAR(B)
- S(d);::B(J)
- Q(f);::R(F)+P(E),XQ(f)
- Q(f);::B(J)
- Refutation
- B(g);XS(H)
- Try
- B(A);
- Threat
- S(H)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,OGATE::QAR1(B),XR(a)
- Q(f);::R(F)+P(E),XQ(f)
- S(d);N_PINP(E)::R(F)+P(E),XS(d)
- Q(f);N_PINP(E)::R(F)+P(E)
- Refutation
- B(g);XB(A)
- Try
- B(A);
- Threat
- S(H)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,OGATE::QAR1(B),XR(a)
- Q(f);::R(F)+P(E),XQ(f)
- S(d);N_PINP(E)::R(F)+P(E),XS(d)
- Q(f);N_PINP(E)::R(F)+P(E)
- Refutation
- B(g);
- Try
- B(A);
- Threat
- S(H)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,OGATE::QAR1(B),XR(a)
- Q(f);::R(F)+P(E),XQ(f)
- S(d);N_PINP(E)::R(F)+P(E),XS(d)
- Q(f);N_PINP(E)::R(F)+P(E)
- Refutation
- B(g);
- Try
- Q(B);N_PINR(a)
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,N_GUARD::QAR1(B),XR(a)
- Refutation
- R(a);XQ(B)
- Try
- Q(B);CHECK,N_PINR(a)
- Refutation
- S(d);XQ(B)
- Try
- Q(B);N_PINR(a)
- Threat
- S(H)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,OGATE,XS(C)::QAB(B),XR(a)
- R(a);CHECK,N_GUARD::QAR1(B),XR(a)
- P(b);OGATEB::QAB(B)
- Q(f);N_PINP(E)::R(F)+P(E)
- Q(f);::R(F)+P(E),XQ(f)
- R(a);N_GUARD::QAR1(B)
- B(g);N_GUARD::S(H),XB(g)
- Refutation
- R(a);
- Try
- Q(B);N_PINR(a)
- Threat
- QAB(B)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,OGATE,P_SPINR(a),XS(C)::QAB(B),XR(a)
- R(a);CHECK,N_GUARD::QAB(B)+S(C),XR(a)
- Q(f);N_PINP(E),XP(K)::R(F)+P(E)
- S(d);SBLOCK::S(H)
- Q(f);::R(F)+P(E),XQ(f)
- S(d);N_PINP(E)::R(F)+P(E),XS(d)
- S(d);S_CUTB(g)::S(H)
- S(e);N_PINP(E)::R(F)+P(E)
- Refutation
- R(a);
- Try
- Actual
- S(H);N_PINR(a)
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- R(a);CHECK,XS(C)::QAR(B)+S(H),XR(a)
- R(a);CHECK,OGATE,P_SPINR(a),XS(H)::QAR1(B),XR(a)
- Q(f);N_PINP(E),XP(K)::R(F)+P(E)
- R(a);::QAR(B)+S(H)
- Q(f);::R(F)+P(E),XQ(f)
- Q(f);::B(J)
- S(d);::B(J)
- S(d);N_GUARD::QAR(B)
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).