MESON Chess Problem Database
Problem Display
PID: 95738 (5K2/B1p1nBp1/Q1bk2P1/1p2N1R1/1r3P2/2N5/8/8 w - - 0 1)
Hartong, Jan
Niemeijer, Meindert
3rd Prize, L'Italia Scacchistica, 1947
#2
9 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Rxf4
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sxg6+
- 2.Rxg6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rb1
- Tries
- 1.Bg1?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rxf4
- 2.Sxb5#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rd4!
- 1...Sxg6+
- 1.Bf2?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rxf4
- 2.Sxb5#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rd4!
- 1...Sxg6+
- 1.Be3?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rxf4
- 2.Sxb5#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rd4!
- 1...Sxg6+
- 1.Bd4?
- threat
- 2.Se4#
- 1...Sxg6+
- 2.Rxg6#
- 1...Rxd4!
- threat
- 1.Bg8?
- 1...Sxg6+
- 2.Rxg6#
- 1...Sxg8
- 2.Qxc6#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Rxf4+!
- 1...Sxg6+
- 1.Rg1?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rxf4!
- 1...Sxg6+
- 1.Rg2?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rxf4!
- 1...Sxg6+
- 1.Rg3?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rxf4!
- 1...Sxg6+
- 1.Rg4?
- 1...Sxg6+
- 2.Rxg6#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Rxf4!
- 1...Sxg6+
- 1.Rf5?
- 1...Rxf4
- 2.Sxb5#
- 1...Sxf5
- 2.Qxc6#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Sxg6+!
- 1...Rxf4
- 1.Rh5?
- 1...Rxf4
- 2.Sxb5#
- 1...Rb1
- 2.Se4#
- 1...Rb2
- 2.Se4#
- 1...Rb3
- 2.Se4#
- 1...Ra4
- 2.Sxb5#
- 1...Rc4
- 2.Sxb5#
- 1...Rd4
- 2.Sxb5#
- 1...Re4
- 2.Sxe4#
- 2.Sxb5#
- 1...Sd5
- 2.Qxc6#
- 1...Sf5
- 2.Qxc6#
- 1...Sc8
- 2.Qxc6#
- 1...Sg8
- 2.Qxc6#
- 1...Sxg6+!
- 1...Rxf4
- 1.Qc8?
- threat
- 2.Qe6#
- 1...Sxg6+
- 2.Rxg6#
- 1...Bd5
- 2.Qd7#
- 2.Qd8#
- 1...Bd7
- 2.Qxd7#
- 1...Sxc8!
- threat
- 1.Qb6?
- threat
- 2.Qc5#
- 1...Sxg6+
- 2.Rxg6#
- 1...Rc4
- 2.Sxb5#
- 1...cxb6!
- threat
- 1.Bg1?
- Keys
- 1.Qa3!
- threat
- 2.Qxb4#
- 1...Sxg6+
- 2.Rxg6#
- 1...Bh1
- 2.Sxb5#
- 1...Bg2
- 2.Sxb5#
- 1...Bf3
- 2.Sxb5#
- 1...Be4
- 2.Sxe4#
- 2.Sxb5#
- 1...Bd5
- 2.Sxb5#
- 1...Bb7
- 2.Sxb5#
- 1...Bd7
- 2.Se4#
- 1...Ba8
- 2.Sxb5#
- 1...Be8
- 2.Se4#
- 1...Sd5
- 2.Se4#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 10
- Sets
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- R(a);N_GUARD,P_PINB(H),XP(B)::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- Tries
- Try
- B(G);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD,P_PINB(H),XP(B)::S(A),XP(b)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);
- Try
- B(G);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD,P_PINB(H),XP(B)::S(A),XP(b)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);
- Try
- B(G);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD,P_PINB(H),XP(B)::S(A),XP(b)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);
- Try
- B(G);
- Threat
- S(A)
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- Refutation
- R(a);XB(G)
- Try
- B(H);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- S(f);N_GUARD,XB(H)::QAR1(E),XB(c)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);CHECK,XP(B)
- Try
- R(D);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);P_PINB(H),XP(B)
- Try
- R(D);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);P_PINB(H),XP(B)
- Try
- R(D);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);P_PINB(H),XP(B)
- Try
- R(D);
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- R(a);P_PINB(H),XP(B)
- Try
- R(D);
- Vars
- R(a);N_GUARD,XP(B)::S(A),XP(b)
- S(f);N_GUARD,XR(D)::QAR1(E),XB(c)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- S(f);CHECK,XP(F)
- Try
- R(D);
- Vars
- R(a);N_GUARD,P_PINB(H),XP(B)::S(A),XP(b)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::QAR1(E),XB(c)
- Refutation
- S(f);CHECK,XP(F)
- Try
- Q(E);N_PINB(c)
- Threat
- QAR1(E)
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- B(c);N_GUARD::QAR1(E),XB(c)
- Refutation
- S(f);XQ(E)
- Try
- Q(E);
- Threat
- QAB1(E)
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- R(a);N_GUARD::S(A),XP(b)
- Refutation
- P(e);N_SPINB(c),XQ(E)
- Try
- Actual
- Q(E);N_PINB(c),P_PINR(a)
- Threat
- QAB(E),XR(a)
- Vars
- S(f);CHECK,OGATE,XP(F)::R(D),XS(f)
- B(c);N_GUARD::S(A),XP(b)
- B(c);N_GUARD::S(A)
- S(f);S_CUTB(c)::S(A)
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).