MESON Chess Problem Database

Problem Display
PID: 21237 (8/8/3Q3K/7B/8/2p5/3pN1R1/2Nk4 w - - 0 1)

Wurzburg, Otto

Pittsburgh Gazette-Times, 1917

8/8/3Q3K/7B/8/2p5/3pN1R1/2Nk4

#2

6 + 3

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Rg1#
  • Tries
    • 1.Sxc3+?
      • 1...Kxc1
        • 2.Qxd2#
      • 1...Kc2
        • 2.Qxd2#
      • 1...Ke1!
    • 1.Qa3?
      • 1...dxc1Q+
        • 2.Qxc1#
      • 1...dxc1B+
        • 2.Qxc1#
      • 1...Kc2
        • 2.Qb3#
      • 1...dxc1S
        • 2.Qxc1#
      • 1...dxc1R
        • 2.Qxc1#
      • 1...c2
        • 2.Rg1#
      • 1...Ke1!
    • 1.Qg3?
      • 1...dxc1Q+
        • 2.Sf4#
      • 1...dxc1B+
        • 2.Sf4#
      • 1...dxc1S
        • 2.Sxc3#
      • 1...dxc1R
        • 2.Sg1#
        • 2.Sxc3#
        • 2.Sd4#
        • 2.Sf4#
      • 1...c2
        • 2.Rg1#
      • 1...Kc2!
    • 1.Qf4?
      • 1...Ke1
        • 2.Rg1#
      • 1...dxc1Q
        • 2.Qxc1#
      • 1...dxc1S
        • 2.Qxc1#
      • 1...dxc1B
        • 2.Qxc1#
      • 1...dxc1R
        • 2.Qxc1#
      • 1...c2
        • 2.Rg1#
        • 2.Qf1#
      • 1...Kc2!
    • 1.Qe5?
      • 1...dxc1Q+
        • 2.Sf4#
      • 1...dxc1B+
        • 2.Sf4#
      • 1...Ke1
        • 2.Sg3#
      • 1...dxc1S
        • 2.Sxc3#
      • 1...dxc1R
        • 2.Sg1#
        • 2.Sxc3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sf4#
      • 1...c2
        • 2.Rg1#
      • 1...Kc2!
    • 1.Qe7?
      • 1...dxc1Q+
        • 2.Sf4#
      • 1...dxc1B+
        • 2.Sf4#
      • 1...Ke1
        • 2.Sg3#
      • 1...dxc1S
        • 2.Sxc3#
      • 1...dxc1R
        • 2.Sg1#
        • 2.Sxc3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sf4#
      • 1...c2
        • 2.Rg1#
      • 1...Kc2!
    • 1.Qd4?
      • 1...Ke1
        • 2.Rg1#
        • 2.Qg1#
      • 1...c2
        • 2.Rg1#
        • 2.Qg1#
      • 1...Kc2!
    • 1.Qd5?
      • 1...Kc2
        • 2.Qb3#
      • 1...c2
        • 2.Rg1#
      • 1...Ke1!
  • Keys
    • 1.Qe6!
      • 1...dxc1Q+
        • 2.Sf4#
      • 1...dxc1B+
        • 2.Sf4#
      • 1...Ke1
        • 2.Sg3#
      • 1...Kc2
        • 2.Qb3#
      • 1...dxc1S
        • 2.Sxc3#
      • 1...dxc1R
        • 2.Sg1#
        • 2.Sxc3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sf4#
      • 1...c2
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R(C)
  • Tries
    • Try
      • S(B);CHECK,XP(c)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XS(A)::QAB1(E),XP(b)
        • K(a);S_FLIGHT::QAR1(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);CHECK,OGATE,XS(A)::QAR1(E),XQ(b)
        • P(b);CHECK,OGATE,XS(A)::QAR1(E),XB(b)
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);OGATE,XS(A)::QAR1(E),XS(b)
        • P(b);OGATE,XS(A)::QAR1(E),XR(b)
        • P(c);SBLOCK::R(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);CHECK,SBLOCK,XS(A)::B(D)+S(B)
        • P(b);SBLOCK,XS(A)::B(D)+S(B),DCHECK,XP(c)
        • P(c);SBLOCK::R(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);P-FLIGHT::R(C)
        • P(b);OGATE,P_PINQ(E),XS(A)::QAR1(E),XQ(b)
        • P(b);OGATE,XS(A)::QAR1(E),XS(b)
        • P(b);OGATE,P_PINQ(E),XS(A)::QAR1(E),XB(b)
        • P(b);OGATE,XS(A)::QAR1(E),XR(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);CHECK,SBLOCK,XS(A)::B(D)+S(B)
        • K(a);P-FLIGHT::QAR(E)+S(B)
        • P(b);SBLOCK,XS(A)::B(D)+S(B),DCHECK,XP(c)
        • P(c);SBLOCK::R(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);CHECK,SBLOCK,XS(A)::B(D)+S(B)
        • K(a);P-FLIGHT::QAR(E)+S(B)
        • P(b);SBLOCK,XS(A)::B(D)+S(B),DCHECK,XP(c)
        • P(c);SBLOCK::R(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(E)
        • P(c);SBLOCK::R(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(E);N_PINP(b)
    • Vars
      • P(b);CHECK,SBLOCK,XS(A)::B(D)+S(B)
      • K(a);P-FLIGHT::QAR(E)+S(B)
      • K(a);S_FLIGHT::QAB1(E)
      • P(b);SBLOCK,XS(A)::B(D)+S(B),DCHECK,XP(c)
      • P(c);SBLOCK::R(C)
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