MESON Chess Problem Database

Problem Display
PID: 95061 (4K2b/4N1N1/R2B4/r7/r3k3/8/3Q2P1/8 w - - 0 1)

Vincze, Stefan

Pravda, 2002

4K2b/4N1N1/R2B4/r7/r3k3/8/3Q2P1/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qe2#
    • 1...Re5
      • 2.Rxa4#
    • 1...Rf5
      • 2.Rxa4#
    • 1...Rg5
      • 2.Rxa4#
    • 1...Rh5
      • 2.Rxa4#
  • Tries
    • 1.Sef5?
      • threat
        • 2.Sg3#
      • 1...Rxf5
        • 2.Rxa4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Ra3
        • 2.Qd4#
      • 1...Re5+!
    • 1.Bc5?
      • threat
        • 2.Re6#
        • 2.Qe3#
      • 1...Ke5
        • 2.Re6#
      • 1...Rxa6
        • 2.Qe3#
      • 1...Bxg7
        • 2.Qe3#
      • 1...Ra3
        • 2.Re6#
        • 2.Qd4#
      • 1...Rd4
        • 2.Re6#
        • 2.Qxd4#
      • 1...Rxc5!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qe2#
      • 1...Kxe5
        • 2.Re6#
      • 1...Rxe5
        • 2.Rxa4#
      • 1...Ra3
        • 2.Qd4#
      • 1...Ra2
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);SBLOCK::QAR2(A)
    • R(c);OGATE,P_PINS(E)::R(C),XR(a)
    • R(c);OGATE::R(C),XR(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(c);OGATE,XS(E)::R(C),XR(a)
        • R(a);N_GUARD::QAR1(A),XR(a)
        • R(a);N_GUARD::QAR1(A)
      • Refutation
        • R(c);CHECK
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::R1(C)
        • R(c);XR(C)::QAR1(A)
        • B(d);XS(F)::QAR1(A)
      • Refutation
        • R(c);XB(D)
  • Actual
    • B(D);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XB(D)::R1(C)
      • R(c);OGATE,P_PINS(E),SBLOCK,XB(D)::R(C),XR(a)
      • R(a);N_GUARD::QAR1(A)
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