MESON Chess Problem Database
Problem Display
PID: 172171 (3B4/pNQP4/kr6/1N6/2P5/8/4B3/4K3 w - - 0 1)
Arnstam, Knut Anders Olof
1st Prize, Schackvarlden TT, 1943
#2
8 + 3
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rxb7
- 2.Qa5#
- 1...Rxb5
- Tries
- 1.Kd1?
- 1...Rxb5
- 2.cxb5#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Qxc6#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rd6+!
- 1...Rxb5
- 1.Kf1?
- 1...Rxb5
- 2.cxb5#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rf6+!
- 1...Rxb5
- 1.Kd2?
- 1...Rxb5
- 2.cxb5#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Qxc6#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rd6+!
- 1...Rxb5
- 1.Kf2?
- 1...Rxb5
- 2.cxb5#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rf6+!
- 1...Rxb5
- 1.Sa3?
- 1...Rxb7
- 2.Qa5#
- 1...Rb2
- 2.Sc5#
- 1...Rb3
- 2.Sc5#
- 1...Rb4
- 2.Sc5#
- 1...Rb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 2.c5#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 2.c5#
- 1...Rg6
- 2.Sc5#
- 2.c5#
- 1...Rh6
- 2.Sc5#
- 2.c5#
- 1...Rb1+!
- 1...Rxb7
- 1.Sc3?
- 1...Rxb7
- 2.Qa5#
- 1...Rb2
- 2.Sc5#
- 1...Rb3
- 2.Sc5#
- 1...Rb4
- 2.Sc5#
- 1...Rb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 2.c5#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 2.c5#
- 1...Rg6
- 2.Sc5#
- 2.c5#
- 1...Rh6
- 2.Sc5#
- 2.c5#
- 1...Rb1+!
- 1...Rxb7
- 1.Sd4?
- 1...Rxb7
- 2.Qa5#
- 1...Rb2
- 2.Sc5#
- 1...Rb3
- 2.Sc5#
- 1...Rb4
- 2.Sc5#
- 1...Rb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 2.c5#
- 1...Rd6
- 2.Sc5#
- 2.c5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 2.c5#
- 1...Rg6
- 2.Sc5#
- 2.c5#
- 1...Rh6
- 2.Sc5#
- 2.c5#
- 1...Rb1+!
- 1...Rxb7
- 1.S5d6?
- 1...Rxd6
- 2.Sc5#
- 1...Rxb7
- 2.Qa5#
- 2.Qxb7#
- 1...Rb2
- 2.Sc5#
- 2.Qa5#
- 1...Rb3
- 2.Sc5#
- 2.Qa5#
- 1...Rb4
- 2.Sc5#
- 2.Qa5#
- 1...Rb5
- 2.cxb5#
- 1...Rc6
- 2.Qa5#
- 2.Qxc6#
- 2.c5#
- 1...Rb1+!
- 1...Rxd6
- 1.Sa5?
- threat
- 2.Qxa7#
- 1...Rxb5
- 2.cxb5#
- 1...Rb7
- 2.Qxb7#
- 1...Kxa5!
- threat
- 1.S7d6?
- threat
- 2.Qxa7#
- 1...Rxb5
- 2.cxb5#
- 1...Rb7
- 2.Qa5#
- 2.Qxb7#
- 1...Ka5!
- threat
- 1.Bf1?
- 1...Rxb5
- 2.cxb5#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Re6+!
- 1...Rxb5
- 1.Bd3?
- 1...Rxb5
- 2.cxb5#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Re6+!
- 1...Rxb5
- 1.Bh4?
- 1...Rxb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rxb7!
- 1...Rxb5
- 1.Bg5?
- 1...Rxb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rxb7!
- 1...Rxb5
- 1.Bf6?
- 1...Rxb5
- 2.cxb5#
- 1...Rxf6
- 2.Sc5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rxb7!
- 1...Rxb5
- 1.Be7?
- 1...Rxb5
- 2.cxb5#
- 1...Rc6
- 2.Qxc6#
- 1...Rd6
- 2.Sc5#
- 1...Re6
- 2.Sc5#
- 1...Rf6
- 2.Sc5#
- 1...Rg6
- 2.Sc5#
- 1...Rh6
- 2.Sc5#
- 1...Rxb7!
- 1...Rxb5
- 1.Qd6?
- 1...Rxd6
- 2.Sc5#
- 1...Rc6
- 2.Sc5#
- 2.Qxc6#
- 1...Kxb7!
- 1...Rxd6
- 1.Qb8?
- threat
- 2.Sc7#
- 2.Qxa7#
- 1...Rxb5
- 2.cxb5#
- 1...Rc6
- 2.Qxa7#
- 1...Rd6
- 2.Sc5#
- 2.Qxa7#
- 1...Re6
- 2.Sc5#
- 2.Qxa7#
- 1...Rf6
- 2.Sc5#
- 2.Qxa7#
- 1...Rg6
- 2.Sc5#
- 2.Qxa7#
- 1...Rh6
- 2.Sc5#
- 2.Qxa7#
- 1...Rxb7!
- threat
- 1.Qc8?
- threat
- 2.Sc7#
- 1...Rxb5
- 2.Sc5#
- 2.cxb5#
- 1...Rc6
- 2.Sc5#
- 2.Qxc6#
- 1...Rd6
- 2.Sa5#
- 2.Sc5#
- 2.S7xd6#
- 1...Re6
- 2.Sa5#
- 2.Sc5#
- 2.S7d6#
- 1...Rf6
- 2.Sa5#
- 2.Sc5#
- 2.S7d6#
- 1...Rg6
- 2.Sa5#
- 2.Sc5#
- 2.S7d6#
- 1...Rh6
- 2.Sa5#
- 2.Sc5#
- 2.S7d6#
- 1...Rxb7!
- threat
- 1.c5?
- 1...Rxb5
- 2.Qc6#
- 1...Rxb7
- 2.Qa5#
- 1...Rc6
- 2.Sa3#
- 2.Sc3#
- 2.Sd4#
- 2.S5d6#
- 2.Qxc6#
- 1...Rd6
- 2.Sd4#
- 2.S5xd6#
- 1...Rf6
- 2.Sa3#
- 2.Sc3#
- 2.Sd4#
- 2.S5d6#
- 1...Rg6
- 2.Sa3#
- 2.Sc3#
- 2.Sd4#
- 2.S5d6#
- 1...Rh6
- 2.Sa3#
- 2.Sc3#
- 2.Sd4#
- 2.S5d6#
- 1...Re6!
- 1...Rxb5
- 1.Kd1?
- Keys
- 1.Qc5!
- 1...Kxb7
- 2.Qc8#
- 1...Rxb5
- 2.Qxb5#
- 1...Rxb7
- 2.Qa3#
- 1...Rc6
- 2.Qxa7#
- 2.Qxc6#
- 1...Rd6
- 2.Qxa7#
- 1...Re6
- 2.Qxa7#
- 1...Rf6
- 2.Qxa7#
- 1...Rg6
- 2.Qxa7#
- 1...Rh6
- 2.Qxa7#
- 1...Kxb7
- 1.Qc5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);P_PINB(B)::S(E)
- R(b);SBLOCK::S(E)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);CHECK
- Try
- S(D);
- Vars
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);::S(E)
- R(b);OGATE::P(C),XR(b)
- R(b);P_PINB(B)::S(E)
- Refutation
- R(b);CHECK
- Try
- S(D);
- Vars
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);::S(E)
- R(b);OGATE::P(C),XR(b)
- R(b);P_PINB(B)::S(E)
- Refutation
- R(b);CHECK
- Try
- S(D);
- Vars
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);::S(E)
- R(b);OGATE::P(C),XR(b)
- R(b);P_PINB(B)::S(E)
- Refutation
- R(b);CHECK
- Try
- S(D);
- Vars
- R(b);XS(D)::S(E)
- R(b);OGATE::P(C),XR(b)
- Refutation
- R(b);CHECK
- Try
- S(E);
- Threat
- QAR1(F),XP(c)
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);N_GUARD::QAB1(F),XR(b)
- Refutation
- K(a);P-FLIGHT,P_SPINR(b),XS(E)
- Try
- S(E);
- Threat
- QAR1(F),XP(c)
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- Refutation
- K(a);P-FLIGHT,P_SPINR(b)
- Try
- B(B);
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);CHECK
- Try
- B(B);
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);CHECK
- Try
- B(H);
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);P_PINB(B)::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);XS(E)
- Try
- B(H);
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);P_PINB(B)::S(E)
- Refutation
- R(b);XS(E)
- Try
- B(H);
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);XB(H)::S(E)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);P_PINB(B)::S(E)
- Refutation
- R(b);XS(E)
- Try
- B(H);
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);OGATEB::QAR2(F),XR(b)
- R(b);::S(E)
- R(b);P_PINB(B)::S(E)
- R(b);SBLOCK::S(E)
- Refutation
- R(b);XS(E)
- Try
- Q(F);P_PINR(b)
- Vars
- R(b);N_SPINR(b),XQ(F)::S(E)
- Refutation
- K(a);N_SPINR(b),S_FLIGHT,XS(E)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- R(b);OGATE,XS(D)::P(C),XR(b)
- R(b);::QAR1(F),XP(c)
- Refutation
- R(b);XS(E)
- Try
- Q(F);
- Threat
- S(D)
- Refutation
- R(b);P_SPINR(b),XS(E)
- Try
- P(C);
- Vars
- R(b);OGATEB,P_SPINR(b),XS(D)::QAR2(F)
- R(b);OGATE,SBLOCK,XS(E)::QAR1(F)
- Refutation
- R(b);P_PINB(B)
- Try
- Actual
- Q(F);
- Vars
- K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(F)
- R(b);OGATE,XS(D)::QAB1(F),XR(b)
- R(b);SBLOCK,XS(E)::QAR(F)
- R(b);OGATE::QAR1(F),XP(c)
- R(b);OGATE,P_PINB(B)::QAR1(F),XP(c)
- R(b);OGATE,SBLOCK::QAR1(F),XP(c)
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).