MESON Chess Problem Database
Problem Display
PID: 263970 (8/ppKN3n/1p1N4/3k1P2/2RBpb2/Q7/3R1qb1/2r2B2 w - - 0 1)
Schoemaker, Cornelis Arie
Tijdschrift vd KNSB, 1960
#2
9 + 10
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Be3#
- 1...Qe3
- 2.Bxe3#
- 1...Qg3
- 2.Be3#
- 1...Qxd4
- 2.Rxd4#
- 1...Qh4
- 2.Be3#
- 1...Qf3
- 2.Be3#
- 1...Rxc4+
- 2.Bxc4#
- 1...Bh2
- 2.Bxf2#
- 1...Bg3
- 2.Bxf2#
- 1...Bxd6+
- 2.Qxd6#
- 1...Sg5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...b5
- 2.Qc5#
- 1...a5
- 2.Sxb6#
- 1...a6
- 2.Sxb6#
- 1...Qg1
- Tries
- 1.Bxb6+?
- 1...Qd4
- 2.Rxd4#
- 2.Qc5#
- 2.Qa5#
- 1...Qxd2
- 2.Qc5#
- 1...Bxd2!
- 1...Qd4
- 1.Qb4?
- threat
- 2.Qb5#
- 1...Rxc4+
- 2.Bxc4#
- 2.Qxc4#
- 1...Bxd6+
- 2.Qxd6#
- 1...b5
- 2.Qc5#
- 2.Qxb5#
- 1...a6
- 2.Sxb6#
- 1...Rb1!
- threat
- 1.Qb3?
- threat
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc5#
- 2.Qb5#
- 1...Rxc4+
- 2.Bxc4#
- 2.Qxc4#
- 1...Qxf1
- 2.Rc5#
- 2.Qb5#
- 1...Qxd2
- 2.Qb5#
- 1...Rxf1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc5#
- 2.Rc6#
- 2.Qb5#
- 1...Bxf1
- 2.Rc5#
- 2.Qb5#
- 1...Bxd2
- 2.Qb5#
- 1...Rb1
- 2.Rc5#
- 1...Qe3
- 2.Bxe3#
- 2.Rc3#
- 2.Rc5#
- 2.Qb5#
- 1...Qg3
- 2.Be3#
- 2.Rc3#
- 2.Rc5#
- 2.Qb5#
- 1...Qe2
- 2.Rc5#
- 2.Qb5#
- 1...Qf3
- 2.Be3#
- 2.Rc3#
- 2.Rc5#
- 2.Qb5#
- 1...Ra1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc5#
- 2.Rc6#
- 2.Qb5#
- 1...Rd1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc5#
- 2.Rc6#
- 2.Qb5#
- 1...Re1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc5#
- 2.Rc6#
- 2.Qb5#
- 1...Rc2
- 2.Rcxc2#
- 2.Rc3#
- 2.Rc5#
- 2.Qb5#
- 1...Rc3
- 2.Rxc3#
- 2.Rc5#
- 2.Qb5#
- 1...b5
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc5#
- 2.Qxb5#
- 1...a6
- 2.Sxb6#
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc5#
- 1...Bxd6+!
- threat
- 1.Qa5+?
- 1...b5
- 2.Qxb5#
- 1...bxa5!
- 1...b5
- 1.Qxa7?
- threat
- 2.Sxb6#
- 2.Qxb7#
- 1...Rxc4+
- 2.Bxc4#
- 1...Qxd4
- 2.Rxd4#
- 2.Qxb7#
- 1...Rb1
- 2.Qxb7#
- 1...b5
- 2.Sb6#
- 2.Qc5#
- 2.Qxb7#
- 1...Bxd6+!
- threat
- 1.Bxb6+?
- Keys
- 1.Qg3!
- threat
- 2.Qg8#
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxd6+
- 2.Qxd6#
- 1...Qxg3
- 2.Be3#
- 1...Bxg3
- 2.Bxf2#
- 1...Bg5
- 2.Qe5#
- 1...Sg5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- threat
- 1.Qg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD::R(B)+B(E)
- Q(b);N_GUARD::R(B)+B(E),XQ(b)
- Q(b);OGATE,P_SPINQ(b),XB(E)::R1(B),XQ(b)
- R(a);CHECK,OGATE,XR(D)::B(A),XR(a)
- B(e);N_GUARD::R(B)+B(E),XQ(b)
- B(e);CHECK,OGATE,XS(G)::QAR1(C),XB(e)
- S(j);N_GUARD::S(I)
- S(j);N_GUARD::S(I),XS(j)
- P(g);N_GUARD::QAR1(C)
- P(h);N_GUARD::S(I),XP(g)
- Tries
- Try
- B(E);CHECK,XP(g)
- Vars
- Q(b);XR(B)::QAR1(C)
- Refutation
- B(e);N_PINS(G),XR(B)
- Try
- Q(C);
- Threat
- QAR2(C)
- Vars
- B(e);CHECK,OGATE,XS(G)::QAR1(C),XB(e)
- P(h);N_GUARD::S(I),XP(g)
- Refutation
- R(a);N_PINR(D)
- Try
- Q(C);
- Threat
- DUALS(5)
- Vars
- Q(b);XR(B)::QAR2(C)
- B(e);N_PINS(G),XR(B)::QAR2(C)
- R(a);N_PINR(D)::QAB(C)+R(D),DCHECK
- Refutation
- B(e);CHECK,XS(G)
- Try
- Q(C);CHECK
- Vars
- P(g);P_SPINP(g)::QAR2(C),XP(g)
- Refutation
- P(g);XQ(C)
- Try
- Q(C);XP(h)
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,OGATE,XR(D)::B(A),XR(a)
- R(a);N_PINR(D)::QAB(C),XP(i)
- Refutation
- B(e);CHECK,XS(G)
- Try
- Actual
- Q(C);
- Threat
- QAB(C)
- Vars
- R(a);CHECK,OGATE,XR(D)::B(A),XR(a)
- B(e);CHECK,OGATE,XS(G)::QAR1(C),XB(e)
- Q(b);N_GUARD,XQ(C)::R(B)+B(E)
- B(e);N_GUARD,XQ(C)::R(B)+B(E),XQ(b)
- B(e);N_PINS(G),OGATE::QAR1(C)
- S(j);N_GUARD::S(I)
- S(j);N_GUARD::S(I),XS(j)
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).