MESON Chess Problem Database
Problem Display
PID: 249365 (1K6/1P6/p1Np4/pnRB4/k1p5/n1RN4/r1P5/3Q4 w - - 0 1)
Prins, Hendrik
5th Comm., Schakend Nederland, 1979
#2
9 + 8
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sb2#
- 1...Rb2
- 2.Sxb2#
- 1...Rxc2
- 2.Sb2#
- 1...Sb1
- 2.R5xc4#
- 1...Sxc2
- 2.R5xc4#
- 1...Sxc3
- 2.Rxa5#
- 1...Sd4
- 2.Rxa5#
- 1...Sa7
- 2.Rxa5#
- 1...Sc7
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Ra1
- Tries
- 1.Ka8?
- 1...Rxc2
- 2.Sb2#
- 1...Sxc2
- 2.R5xc4#
- 1...Sxc3
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Ra1
- 2.Sb2#
- 1...Rb2
- 2.Sxb2#
- 1...Sb1
- 2.R5xc4#
- 1...Sd4
- 2.Rxa5#
- 1...Sa7
- 2.Rxa5#
- 1...Sc7+!
- 1...Rxc2
- 1.Kc8?
- 1...Rxc2
- 2.Sb2#
- 1...Sxc2
- 2.R5xc4#
- 1...Sxc3
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Ra1
- 2.Sb2#
- 1...Rb2
- 2.Sxb2#
- 1...Sb1
- 2.R5xc4#
- 1...Sd4
- 2.Rxa5#
- 1...Sc7
- 2.Rxa5#
- 1...Sa7+!
- 1...Rxc2
- 1.Be6?
- 1...Rxc2
- 2.Sb2#
- 1...Sxc2
- 2.R5xc4#
- 1...Sxc3
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Ra1
- 2.Sb2#
- 1...Rb2
- 2.Sxb2#
- 1...Sb1
- 2.R5xc4#
- 1...Sd4
- 2.Rxa5#
- 1...Sa7
- 2.Rxa5#
- 1...Sc7
- 2.Rxa5#
- 1...d5!
- 1...Rxc2
- 1.Bf7?
- 1...Rxc2
- 2.Sb2#
- 1...Sxc2
- 2.R5xc4#
- 1...Sxc3
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Ra1
- 2.Sb2#
- 1...Rb2
- 2.Sxb2#
- 1...Sb1
- 2.R5xc4#
- 1...Sd4
- 2.Rxa5#
- 1...Sa7
- 2.Rxa5#
- 1...Sc7
- 2.Rxa5#
- 1...d5!
- 1...Rxc2
- 1.Bg8?
- 1...Rxc2
- 2.Sb2#
- 1...Sxc2
- 2.R5xc4#
- 1...Sxc3
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Ra1
- 2.Sb2#
- 1...Rb2
- 2.Sxb2#
- 1...Sb1
- 2.R5xc4#
- 1...Sd4
- 2.Rxa5#
- 1...Sa7
- 2.Rxa5#
- 1...Sc7
- 2.Rxa5#
- 1...d5!
- 1...Rxc2
- 1.Rxa3+?
- 1...Rxa3
- 2.Sb2#
- 2.Rxc4#
- 1...Sxa3
- 2.Rxa5#
- 1...Kxa3!
- 1...Rxa3
- 1.Ka8?
- Keys
- 1.Qa1!
- 1...Rxa1
- 2.Sb2#
- 1...Rxc2
- 2.R5xc4#
- 1...Sxc2
- 2.Sb2#
- 1...Sxc3
- 2.Rxa5#
- 1...cxd3
- 2.Bb3#
- 1...dxc5
- 2.Sxc5#
- 1...Rb2
- 2.Sxb2#
- 1...Sb1
- 2.Sb2#
- 2.R5xc4#
- 1...Sd4
- 2.Rxa5#
- 1...Sa7
- 2.Rxa5#
- 1...Sc7
- 2.Rxa5#
- 1...Rxa1
- 1.Qa1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- R(a);N_GUARD,P_SPINR(a),XP(B)::S(D)
- S(b);N_GUARD::R(E),XP(d)
- S(b);N_GUARD,P_SPINS(b),XP(B)::R(E),XP(d)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- S(f);OGATE::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- Tries
- Try
- K(I);P-FLIGHT
- Vars
- R(a);N_GUARD,P_SPINR(a),XP(B)::S(D)
- S(b);N_GUARD,P_SPINS(b),XP(B)::R(E),XP(d)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(b);N_GUARD::R(E),XP(d)
- S(f);OGATE::R1(E),XP(e)
- Refutation
- S(f);CHECK
- Try
- K(I);P-FLIGHT
- Vars
- R(a);N_GUARD,P_SPINR(a),XP(B)::S(D)
- S(b);N_GUARD,P_SPINS(b),XP(B)::R(E),XP(d)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(b);N_GUARD::R(E),XP(d)
- S(f);OGATE::R1(E),XP(e)
- Refutation
- S(f);CHECK
- Try
- B(F);
- Vars
- R(a);N_GUARD,P_SPINR(a),XP(B)::S(D)
- S(b);N_GUARD,P_SPINS(b),XP(B)::R(E),XP(d)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(b);N_GUARD::R(E),XP(d)
- S(f);OGATE::R1(E),XP(e)
- Refutation
- P(h);
- Try
- B(F);
- Vars
- R(a);N_GUARD,P_SPINR(a),XP(B)::S(D)
- S(b);N_GUARD,P_SPINS(b),XP(B)::R(E),XP(d)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(b);N_GUARD::R(E),XP(d)
- S(f);OGATE::R1(E),XP(e)
- Refutation
- P(h);
- Try
- B(F);
- Vars
- R(a);N_GUARD,P_SPINR(a),XP(B)::S(D)
- S(b);N_GUARD,P_SPINS(b),XP(B)::R(E),XP(d)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(b);N_GUARD::R(E),XP(d)
- S(f);OGATE::R1(E),XP(e)
- Refutation
- P(h);
- Try
- R(C);CHECK,XS(b)
- Vars
- S(f);OGATE,SBLOCK,XR(C)::R1(E),XP(e)
- Refutation
- K(c);P-FLIGHT,XR(C)
- Try
- Actual
- Q(A);
- Vars
- R(a);N_GUARD,XQ(A)::S(D)
- R(a);P_SPINS(b),XP(B)::R(E),XP(d)
- S(b);P_SPINR(a),XP(B)::S(D)
- S(f);OGATE,XR(C)::R1(E),XP(e)
- P(d);OGATE,XS(D)::B(F)
- P(h);XR(E)::S(D),XP(h)
- R(a);N_GUARD,P_SPINS(b)::S(D),XR(a)
- S(f);OGATE::R1(E),XP(e)
Developed and maintained by Brian Stephenson.
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