MESON Chess Problem Database

Problem Display
PID: 229191 (N7/1n1B4/6n1/2k5/Rr1R4/1b6/1Q2NB2/b4K2 w - - 0 1)

Pikler, Robert

Ujsag, 1926

N7/1n1B4/6n1/2k5/Rr1R4/1b6/1Q2NB2/b4K2

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
    • 1...Rb6
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
    • 1...Bd1
      • 2.Qxb4#
    • 1...Ba2
      • 2.Qxb4#
    • 1...Bc2
      • 2.Qxb4#
    • 1...Bxa4
      • 2.Qxb4#
    • 1...Bc4
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Qxb4#
    • 1...Bd5
      • 2.Qxb4#
    • 1...Be6
      • 2.Qxb4#
    • 1...Bf7
      • 2.Qxb4#
    • 1...Bg8
      • 2.Qxb4#
  • Tries
    • 1.Ra5+?
      • 1...Rb5
        • 2.Rxb5#
        • 2.Qa3#
      • 1...Sxa5!
    • 1.Rd1+?
      • 1...Kc4
        • 2.Sb6#
      • 1...Rd4!
    • 1.Rd2+?
      • 1...Kc4
        • 2.Sb6#
      • 1...Rd4!
    • 1.Rd3+?
      • 1...Kc4
        • 2.Qxb3#
      • 1...Rd4!
    • 1.Rd5+?
      • 1...Kc4
        • 2.Sb6#
      • 1...Kxd5!
    • 1.Rd6+?
      • 1...Kc4
        • 2.Sb6#
      • 1...Rd4
        • 2.Qa3#
      • 1...Kxd6!
    • 1.Qc3+?
      • 1...Rc4
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd3#
      • 1...Bc4
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Qxb4#
      • 1...Bxc3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Se4#
      • 1...Bc4+
        • 2.Rd3#
      • 1...Rxd4
        • 2.Qa3#
      • 1...Bd5
        • 2.Qxb4#
      • 1...Bc2
        • 2.Qxb4#
      • 1...Sd6
        • 2.Rdxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(b);OGATE::QAB1(B),XR(c)
    • B(b);OGATE,XR(E)::QAB1(B),XR(c)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • S(f);XR(E)
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::S(H)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::S(H)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::QAB1(B),XB(b)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::S(H)
      • Refutation
        • K(d);P-FLIGHT,XR(F)
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::S(H)
        • R(c);P_SPINR(c),S_CUTB(a)::QAB(B)
      • Refutation
        • K(d);S_FLIGHT,XR(F)
    • Try
      • Q(B);CHECK
      • Refutation
        • B(a);XQ(B)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(b);CHECK,SBLOCK,S_CUTR(c)::B(D)+R(F)
      • R(c);OGATEB,P_SPINR(c),XR(F)::QAB(B)
      • B(b);OGATE::QAB1(B),XR(c)
      • S(f);SBLOCK::B(D)+R(F),XR(c)
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