MESON Chess Problem Database
Problem Display
PID: 224153 (b1R4b/3B1Q2/p7/7r/N6r/1P1k1pN1/3P4/3K2B1 w - - 0 1)
Petite, Efren
Suomen Shakki, 1956
#2
9 + 7
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Qc4#
- 1...Rh2
- 2.Qc4#
- 1...Rh3
- 2.Qc4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Sb2#
- 2.Rc3#
- 1...Rc5
- 2.Sxc5#
- 1...Rd5
- 2.Qxf3#
- 1...Re5
- 2.Sb2#
- 2.Rc3#
- 1...Rh6
- 2.Sc5#
- 1...Rh7
- 2.Sc5#
- 1...Be4
- 2.Qc4#
- 1...Bd5
- 2.Sc5#
- 1...Bb2
- 2.Sxb2#
- 1...Bc3
- 2.Rxc3#
- 1...Bd4
- 2.Qc4#
- 1...Be5
- 2.Sc5#
- 1...Rh1
- Tries
- 1.Bg4?
- threat
- 2.Qc4#
- 1...Rc5
- 2.Sxc5#
- 1...Rd5
- 2.Qxf3#
- 1...Bd5
- 2.Sc5#
- 1...Rxg4!
- threat
- 1.Bf5+?
- 1...Re4
- 2.Sc5#
- 2.Qc4#
- 1...Be4
- 2.Sc5#
- 2.Qc4#
- 1...Rxf5!
- 1...Re4
- 1.Qd5+?
- 1...Rd4
- 2.Sb2#
- 2.Sc5#
- 2.Rc3#
- 1...Bxd5
- 2.Sc5#
- 1...Bd4
- 2.Sb2#
- 2.Sc5#
- 2.Rc3#
- 2.Qc4#
- 1...Rxd5!
- 1...Rd4
- 1.Qe6?
- threat
- 2.Qe3#
- 1...Re5
- 2.Sb2#
- 2.Rc3#
- 1...Be4
- 2.Qc4#
- 1...Bd4
- 2.Qc4#
- 1...Be5
- 2.Sc5#
- 1...Re4!
- threat
- 1.Qf5+?
- 1...Re4
- 2.Sc5#
- 1...Be4
- 2.Sc5#
- 1...Rxf5!
- 1...Re4
- 1.Qf6?
- threat
- 2.Sb2#
- 2.Rc3#
- 1...Rxa4
- 2.Rc3#
- 1...Rc4
- 2.Sb2#
- 1...Rc5
- 2.Sb2#
- 2.Sxc5#
- 1...Bc6
- 2.Sb2#
- 1...Bxf6!
- threat
- 1.Qg7?
- threat
- 2.Sb2#
- 2.Rc3#
- 1...Rxa4
- 2.Rc3#
- 1...Rc4
- 2.Sb2#
- 1...Rc5
- 2.Sb2#
- 2.Sxc5#
- 1...Bc6
- 2.Sb2#
- 1...Bxg7!
- threat
- 1.Bg4?
- Keys
- 1.Rd8!
- threat
- 2.Bb5#
- 2.Bf5#
- 1...Rc4
- 2.Bf5#
- 2.Qxc4#
- 1...Rd4
- 2.Sb2#
- 1...Re4
- 2.Bb5#
- 1...Rb5
- 2.Bxb5#
- 2.Bf5#
- 1...Rd5
- 2.Qxf3#
- 1...Rf5
- 2.Bb5#
- 2.Bxf5#
- 1...Be4
- 2.Bb5#
- 2.Qc4#
- 1...Bd5
- 2.Sc5#
- 1...Bc6
- 2.Bf5#
- 1...Bd4
- 2.Qc4#
- threat
- 1.Rd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- R(c);N_GUARD,P_PINB(B)::QAB1(H)
- R(c);N_GUARD::QAB1(H)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(d);N_GUARD::S(F),XR(d)
- R(d);S_CUTB(f)::QAR2(H),XP(b)
- R(d);N_GUARD::S(F)
- B(f);S_CUTR(c)::QAB1(H)
- B(f);S_CUTR(d)::S(F)
- B(g);N_GUARD::S(F),XB(g)
- B(g);N_GUARD::R1(I),XB(g)
- B(g);S_CUTR(c)::QAB1(H)
- B(g);S_CUTR(d)::S(F)
- Tries
- Try
- B(G);
- Threat
- QAB1(H)
- Vars
- R(d);N_GUARD::S(F),XR(d)
- R(d);S_CUTB(f)::QAR2(H),XP(b)
- B(f);S_CUTR(d)::S(F)
- Refutation
- R(c);XB(G)
- Try
- B(G);CHECK
- Refutation
- R(d);XB(G)
- Try
- Q(H);CHECK
- Vars
- B(f);XQ(H)::S(F)
- Refutation
- R(d);XQ(H)
- Try
- Q(H);
- Threat
- QAR1(H)
- Vars
- B(f);S_CUTR(c)::QAB1(H)
- B(g);S_CUTR(c)::QAB1(H)
- B(g);S_CUTR(d)::S(F)
- Refutation
- R(c);
- Try
- Q(H);CHECK
- Vars
- R(c);P_SPINR(c)::S(F)
- B(f);P_SPINB(f)::S(F)
- Refutation
- R(d);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(c);XS(F)::R1(I)
- R(c);::S(F)
- B(f);::S(F)
- Refutation
- B(g);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(c);XS(F)::R1(I)
- R(c);::S(F)
- B(f);::S(F)
- Refutation
- B(g);XQ(H)
- Try
- Actual
- R(I);
- Threat
- DUALS(2)
- Vars
- R(c);S_CUTB(g)::S(F)
- R(c);::R(I)+B(G),DCHECK
- R(d);S_CUTB(f)::QAR2(H),XP(b)
- B(f);S_CUTR(d)::S(F)
- B(f);::R(I)+B(G),DCHECK
- B(g);S_CUTR(c)::QAB1(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).